Date 14/05/2020
GENERAL SCIENCE
Chapter 1: Our body systems
Just as a building is made up of bricks our body is made up of cells.
Cells are the building blocks of our body.
These cells join together to form complex organs and organ systems.
Cells are the smallest functional unit of our body
Cells
Tissues
Many cells join together to form a tissue.
Many tissues join together to form an organ; for example a kidney.
Many organs join together to form an organ system; for example the excretory system.
Number of organ systems join together and function together to form an organism; for example a Human being.
Examples of- Cells -> Tissues -> Organ -> Organ system -> Organism
PLANTS AND ANIMALS
HUMAN BABY
HUMAN CHILD
Now watch this video...
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Ex:1 Answer the following questions:
a) Define a cell?
b) Define tissue?
Ex:2 Tick the right option:
1) The Building blocks of our body are
a) cells
b) tissues
2) Kidney is an example of
a) tissue
b) organ
3) Bones join together to form a framework called
a) skeleton
b) cartilage
4) The size of which organ remain the same throughout life
a) eye
b) heart
5) Brain , spinal cord and nerves are part of the-
a) Circulatory system
b) Nervous system
Date 15/05/2020
GENERAL SCIENCE
Chapter 1: Our Body Systems
ORGAN SYSTEMS
Now watch this video:
When few organs together carry out the major function for the body. They form an organ system.The different Organ systems help a body to function properly. There are eight important systems in the body.
IMPORTANT POINTS TO REMEMBER
SKELETAL SYSTEM: The skeletal system comprises of a bony framework. It gives shape and support to our body. There are 206 bones in our body When joined together, they form a united framework called skeleton.
MUSCULAR SYSTEM: Muscles are attached to the bones. It helps in body movement.There are more than 500 muscles in our body
NERVOUS SYSTEM: The nervous system is the control center of the human body. It is made up of the brain, the spinal cord and the nerves.This system helps us to think reason and act accordingly.
DIGESTIVE SYSTEM: The purpose of the digestive system is to turn the food you eat into something useful for the body so your cells can use it to make energy.
RESPIRATORY SYSTEM: The respiratory system supplies blood with oxygen through breathing, in order for the blood to deliver oxygen to all parts of the body.
CIRCULATORY SYSTEM: This system is concerned with circulating blood to deliver oxygen and nutrients to every part of the body.
EXCRETORY SYSTEM: The excretory system filters the blood to remove wastes that could be harmful to the body.
REPRODUCTIVE SYSTEM: The human reproductive system makes it possible for humans to have babies.
Now watch this video:
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Ex 1 Answer the following questions (Hints: Highlighted above)
a) How many bones are there in our body?
b) What is the bony framework of our body called?
Ex.2 Write whether each statement is true or false:
a) Tissues are building blocks of our body.
b) Cells join together to form a tissue.
c) Kidney is an organ.
d) Excretory system is an organisation.
Date 16/05/2020
GENERAL SCIENCE
Chapter 1: Our body Systems
SENSE ORGANS
There are five sense organs. They are the Nose, Eyes, Ears, tongue and Skin. These organs are connected to the brain through network of nerves.
Now watch this video:
Functions of the Five Sense Organs
Assignment:
Practice Copy the chart below to your OCB-SCIENCE exercise book.
Ex-1 Complete the Answers in your OCB-SCIENCE exercise book.
a) How many sense organs are there? Name them.
Ans. There are five sense organs. The eyes, nose, ears, tongue and skin.
Ans. There are five sense organs. The eyes, nose, ears, tongue and skin.
b) What are the function of the five sense organs?
And. The function of the five sense organs are to see, smell, hear, taste and touch or feel.
And. The function of the five sense organs are to see, smell, hear, taste and touch or feel.
Date 18/05/2020
GENERAL SCIENCE
Chapter 1: Our Body Systems
Assignment
Assignment
Read and understand Chapter 1: Our Body Systems
Now watch this video:
Complete the following exercises in your OCB-SCIENCE exercise book
Ex-1 Fill in the blanks with the given options.
(slugs, circulatory, excretory, digestion)
1)________ system helps to remove the waste material from the body.
2) Breaking down of complex food into simple food is known as _________.
3) The __________ system is composed of heart, blood and blood vessels.
4)__________ and earthworm have water skeleton.
Ex-2 Answer the following by filling up the blanks.
1
| Number of cells join together to form a | T _ _ S _ _ |
2
| Number of bones in our body | _ _ _ |
3
| It carries oxygen and digested food to all parts of body | B _ _ _ D |
4
| The process which releases energy in our body | R _ _ P _ R _ _ I _ _ |
5
| The system that helps to produce babies | R _ _ R _ D _ _ T _ _ N |
Date 19/05/2020
GENERAL SCIENCE
Chapter 1: Our Body Systems
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Ex-1 Write (t) True or (f) False:
1) Undigested food pass out through anus.
2) Lung is the main pumping Organ.
3) Skeleton gives shape and support to our body.
4) Kidneys are the part of nervous system.
Ex-2 Answer the following questions.
a) What is respiration?
Ans. Respiratory is when the blood is supplied with oxygen through breathing and to be delivered to all the parts of the body.
Ans. Respiratory is when the blood is supplied with oxygen through breathing and to be delivered to all the parts of the body.
b) What is digestion?
Ans. Digestion is to turn the food we eat into useful substances that the cells of our body can use to make energy.
Ex-2 Match the following:
Ans. Digestion is to turn the food we eat into useful substances that the cells of our body can use to make energy.
Date 20/05/2020
GENERAL SCIENCE
Chapter 1: Our Body Systems
The function of the Excretory System
Now watch this video:
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Ex.1- Draw the following diagram in your OCB copy and label it:
The EXCRETORY SYSTEM which is also referred to as the URINARY SYSTEM
Date 21/05/2020
GENERAL SCIENCE
Chapter 1: Our Body Systems
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Ex-1 Unscramble these words.( The first one has done for you)
a) NRAGO- ORGAN
b) SSETIU-
c) KEETSLNO-
d) OVUENRS-
e) EITGIDESV-
Ex-2 Answer the following questions:
1) What is the function of blood?
Ans. The function of blood is to deliver oxygen and nutrients to every part of the body.
Ans. The function of blood is to deliver oxygen and nutrients to every part of the body.
2) Why should we breathe through our nose?
3) What does a nervous system comprise of?
3) What does a nervous system comprise of?
Ex-3 Do this activity in your OCB copy
Date 22/05/2020
GENERAL SCIENCE
Chapter 2:The RESPIRATORY SYSTEM
The process of Respiratory system are:
BREATHING:
The process during which air rich in oxygen is taken in and air rich in water vapours and carbon dioxide is given out is known as breathing.
INHALATION:
The process of taking in of air is known as inhalation.
EXHALATION:
The process of giving out of air is known as exhalation.
Breathing is a continuous process and occurs throughout the life of all organisms.
RESPIRATION:
The process of breaking down the complex food substances with the help of oxygen and releasing energy is known as respiration. It takes place inside the body cells.
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Hints: Highlighted above
Ex-1 Answer the following questions:
a) What is breathing?
b) What is inhalation?
c) What is exhalation?
d) What is respiration?
Chapter 2: The RESPIRATORY SYSTEM
Three characteristics of the lungs which makes them efficient are:
They have rich blood supply,
COUGHING: When unwanted particles present in the inhaled air enter into the Respiratory Tract, then we feel like coughing. This coughing throw out these unwanted particles and clears the Respiratory Tract.
Date 23/05/2020
GENERAL SCIENCE
Now watch this video...
THE RESPIRATORY SYSTEM
All the organs that help in respiration, together, form the respiratory system. The various parts of respiratory system includes the nose, nasal passage, windpipe and lungs.
Nose and nasal passage: We breathe through our nose or nostrils. The nostrils contain hair which trap dust particles and germs and send clean air for respiration. Thus we should always breathe through our nose.
Windpipe: The air from the nasal passage reaches the lungs through the windpipe and then divides into two called bronchi and then enters into the both the lungs.
LUNGS
Lungs are the main respiratory organs in our body. They are a pair of spongy, elastic and bag like structures.When we breathe in, the lungs get filled with fresh air.
They have rich blood supply,
Their inner surface is moist,
They have a large combined surface area.
Now watch this video...
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book.
Ex.1 Fill in the blanks:
a) We should always breathe through our _______.
b) Respiration takes place inside the _______ of the body.
c) Windpipe divides into two ___________.
c) Windpipe divides into two ___________.
Ex. 2 Write whether the given statements are True or False:
a) Breathing takes place in the morning.
b) The air from nasal passage reach the heart.
c) The air we inhale contain a lot of carbon dioxide.
Ex. 3 Draw a neat and clear diagram of the Lungs and list three of its important characteristics. (Hints: Highlighted above)
Date 26/05/2020
GENERAL SCIENCE
Chapter 2: The RESPIRATORY SYSTEM
BREATHING RATE
Breathing Rate is the number of times you breathe in and out.
How to find your Breathing Rate before and after vigorous physical activity.
Count the number of times you breathe in and out in one minute under normal conditions . Now run fast for 2 minutes. Again count the number of times you breathe in and out in one minute.
Conclusion: The Breathing Rate does not remain same under all conditions. The Breathing Rate increases after vigorous exercise and decreases when you are at rest.
AIR POLLUTION
The mixing of harmful components in the air is called Air Pollution. It effects our respiratory system and cause a number of diseases. The germs present in the air enter into the respiratory tract and multiply causing various allergies and diseases.
BREATHING RATE
Breathing Rate is the number of times you breathe in and out.
How to find your Breathing Rate before and after vigorous physical activity.
Count the number of times you breathe in and out in one minute under normal conditions . Now run fast for 2 minutes. Again count the number of times you breathe in and out in one minute.
Conclusion: The Breathing Rate does not remain same under all conditions. The Breathing Rate increases after vigorous exercise and decreases when you are at rest.
AIR POLLUTION
The mixing of harmful components in the air is called Air Pollution. It effects our respiratory system and cause a number of diseases. The germs present in the air enter into the respiratory tract and multiply causing various allergies and diseases.
Now watch this video:
SNEEZING: All particles have germs in them. When we inhale, these particles get trapped in the hair present inside the nose. However, sometimes these particles do not get trapped which cause us irritation. This irritation forces us to sneeze in order to throw out these loose particles, and clear the nostrils.
Assignment:
Complete the following exercises in your OCB-SCIENCE exercise book
Ex. A: Tick the right option from the ones given.
1) Respiration takes place inside
| |
a) the lungs
|
b) the cells of the body
|
2) Which of the following process release energy?
| |
a) breathing
|
b) respiration
|
3) The process of taking in air is known as
| |
a) inhalation
|
b) exhalation
|
4) How many bronchi are there in our lungs?
| |
a) two
|
b) three
|
5) Our body needs which gas for respiration?
| |
a) oxygen
|
b) carbon dioxide
|
Ex. B: Fill in the blanks with the options given in brackets.
(respiratory, increases, fatty, breathing rate, communicable)
1) ________ is the number of times you breathe in and out.
2) Breathing ________ after vigorous exercise.
3) Too much of _______ food leads to obesity.
4) A common cold is a _________ disease.
5) Air pollution effects our ________ system the most.
Assignment:
Complete the following exercises in your Science-OCB.
Ex. A Give one word for the following.
1) Inhalation and exhalation of air is called
B__________.
2) The passage that originates from nose
N _________.
3)The spongy, elastic, bag like structure
L ________.
4) The gas released during respiration
C______________.
5) Nasal discharge is observed during
C_______________.
Ex. B Write True or False.
1) Our body needs energy to work.
2) The process of taking in air is known as exhalation.
3) Breathing is a non continuous process.
4) Too much of fatty foods help to breathe properly.
5) Asthma is an allergic disorder of the lungs.
Chapter 2: The RESPIRATORY SYSTEM
Chapter 3: PLANTS
Plants are living organisms.They are fixed to the soil.plants also have many body parts. There are different kinds of plants. These plants differ in height , structure and looks .Most of the plants grow in soil. Hence, we can divide the body of a plant into two main parts: Root and Shoot.
Date 27/05/2020
GENERAL SCIENCE
Chapter 2 THE RESPIRATORY SYSTEM
AIR POLLUTION
PRECAUTIONS
1) Eating healthy food keeps our body healthy and prevents us from diseases.
2) The common cold is a communicable disease. Hence, you must cover your nose and mouth with a handkerchief while sneezing.
3) Take personal care of health and hygiene.
4) In case of a severe cold, visit the doctor.
HOW TO ENSURE HEALTHY BREATHING
1) Morning walks are very helpful because the air is clean and fresh.
2) The common cold is a communicable disease. Hence, you must cover your nose and mouth with a handkerchief while sneezing.
3) Take personal care of health and hygiene.
4) In case of a severe cold, visit the doctor.
HOW TO ENSURE HEALTHY BREATHING
1) Morning walks are very helpful because the air is clean and fresh.
2) Alpha breathing process increases the capacity of lungs.
3) People during yoga maintain good posture which helps to breathe property.
3) People during yoga maintain good posture which helps to breathe property.
Assignment:
Complete the following exercises in your Science-OCB.
Ex. A Give one word for the following.
1) Inhalation and exhalation of air is called
B__________.
2) The passage that originates from nose
N _________.
3)The spongy, elastic, bag like structure
L ________.
4) The gas released during respiration
C______________.
5) Nasal discharge is observed during
C_______________.
Ex. B Write True or False.
1) Our body needs energy to work.
2) The process of taking in air is known as exhalation.
3) Breathing is a non continuous process.
4) Too much of fatty foods help to breathe properly.
5) Asthma is an allergic disorder of the lungs.
Date 28/05/2020
GENERAL SCIENCE
To note the expansion and contraction of the chest during inhalation and exhalation.
Take a deep breathe and retain the air in your body. Quickly measure the size of your chest region with tailor's tape . Now, exhale the air forcibly. Now, again measure the size of your chest region with tailor's tape.
Thus, we conclude that size of chest increases during inhalation and it decreases during exhalation.
Assignment
Ex-C Match the following:
Complete the following exercises in your OCB-SCIENCE exercise book
Ex-A Unscramble the letters to reveal the words:(The first one has been done for you )
1) ULGNS - LUNGS
2) HNIELA-
3) HSATAM-
4) GOCUH-
5) EEESNZ-
Ex-B Answer the following questions;
1) Name the Organ that comprise the respiratory system.
2) What happens to the size of chest while inhaling and exhaling ?
3) What is breathing rate?
Ex-C Match the following:
1) Lungs
|
a) contain hairs
|
2) Nostrils
|
b) contraction of size of chest
|
3) Obesity
|
c) main respiratory organ
|
4) Germs
|
d) too much of fatty foods
|
5) Exhalation
|
e) cause disease
|
Date 29/05/2020
GENERAL SCIENCE
Plants are living organisms.They are fixed to the soil.plants also have many body parts. There are different kinds of plants. These plants differ in height , structure and looks .Most of the plants grow in soil. Hence, we can divide the body of a plant into two main parts: Root and Shoot.
Now watch this video:
Root:
The part of a plant in the soil or below the ground is called the root.
Shoot:
The part of a plant in the air or above the ground is called the shoot.
Roots fix the plant to soil and shoot contain stem which bears fruits ,flowers and buds
Minerals:
Substances present in the soil that the plant takes into stay healthy are known as minerals.
Assignment
Shoot:
The part of a plant in the air or above the ground is called the shoot.
Roots fix the plant to soil and shoot contain stem which bears fruits ,flowers and buds
Minerals:
Substances present in the soil that the plant takes into stay healthy are known as minerals.
Assignment
Complete the following exercises in your OCB-SCIENCE exercise book
Ex-A Answer the following questions:
Hints: (Highlighted above)
a) Define plants?
b) Define Root?
c) Define Shoot?
d) Define minerals ?
Chapter 3: PLANTS
ROOTS
Function of Roots
Fibrous Root System
Tap Root System
Radish and carrot are two roots which we can eat.
Assignment
Complete the following exercises in your Science-OCB.
Date 1/06/2020
Functions of the stem:
Hard stems support the plant.
Weak and green stems prepare food for plant.
Plants without stems are just like the human body without bones or the skeleton. It bears the weight of the branches, leaves, flowers and fruits.
Assignment:
Ex-A Answer the following questions:
Hints: (Highlighted above)
a) Define plants?
b) Define Root?
c) Define Shoot?
d) Define minerals ?
Date 30/05/2020
GENERAL SCIENCE
ROOTS
Now watch this video
The part of the plant which remains under the ground is called the root.
* It holds the plant firmly to the soil.
* It helps to take up water and minerals from the soil.
* Some roots store the food and are used for eating.
TYPES OF ROOTS
Roots are mainly of two types
Fibrous Roots and Tap Roots.
Fibrous Roots and Tap Roots.
When several tiny roots grow from the end of the stem, it is called fibrous root system.
Ex- Wheat and Rice
When a single main roots grow from the end of stem and many small roots grow from it, it is called a tap root system.
Ex- Cotton and mustard.
Complete the following exercises in your Science-OCB.
Ex. A: Answer the following questions: Hints:(Highlighted above)
1) What are the functions of roots?
2) How many types of roots are there? Name them.
3) Name at least two roots that we can eat?
Ex. B: Unscramble the words to reveal the four main parts of a plant.
1
|
RWELFO
| |
2
|
EAFL
| |
3
|
ESTM
| |
4
|
TORO
|
Date 1/06/2020
GENERAL SCIENCE
Chapter 3: PLANTS
STEM
Now watch this video
STEM
Now watch this video
The stem is the main part of a shoot. It bears leaves, buds and flowers. The main stem which is large and thick is the trunk and the other thinner stems are the branches.
The stem holds up leaves and flowers. It carries water to all parts of the plant.
Weak and green stems prepare food for plant.
Some stems store food and are used for eating
Two stems which all children like to eat are potato and sugarcane.
Two stems which all children like to eat are potato and sugarcane.
Types of stems:
Stems are broadly classified into three categories:
1) Soft and green stems.
2) Hard and woody stems.
3) weak stems
Complete the following exercises in your Science-OCB.
Ex. A: Answer the following questions.
Hints:(Have been Highlighted above)
1) What are the functions of a stem?
2) How many types of stems are there? Name them.
3) Name two stems which we can eat.
4) Which stems can prepare food?
4) Which stems can prepare food?
Ex. B: Write whether each statement is True or False;
1) The part of the plant which remains underground is known as the shoot.
2) Roots hold the plant firmly to the soil.
3) Green stems do not prepare food for the plant.
4) Weak stems hold the plant upright.
Functions of the Leaf:
Date 2/06/2020
GENERAL SCIENCE
Chapter 3: PLANTS
LEAF
LEAF
Now watch this video...
Leaves are usually green coloured structures attached to the stem. The leaf absorbs maximum sunlight due to its flat surface.
Green leaves help the plant to prepare it's food.
Leaves contain stomata which make it possible for plants to breathe.
Some leaves are thick and fleshy and store food. Such leaves can be eaten.
Assignment:
Assignment:
Complete the following exercises in your Science-OCB exercise book.
Ex.1: Answer the following questions. Hints are highlighted above.
a) What is the colour of most leaves?
b) Which feature of the leaf helps to absorb maximum sunlight?
c) What are the functions of a leaf?
d) Where is the stomata present?
e) What are the vessels which carry water to a leaf known as?
Chapter 3: PLANTS
FLOWERS AND FRUITS
FRUITS
Fruits are the sweet edible part of a plant .
Fruits also contain a sweet fragrance.Not only human beings, but many birds and animals also eat fruits. Fruits are formed from flowers.They contain seeds. The number of seeds are different in every fruit.
The Functions of Fruits
Fruits store the food material. It contain the seeds. These seeds give rise to a new plant when it falls to the ground or when we plant them.
Assignment:
Chapter 3: PLANTS
SEEDS
Now watch this video
Non-edible seeds: Seeds of some plants cannot be eaten such seeds are called non-edible seeds, like orange and apple seeds.
A seed is protected by a hard layer when it is sown, this hard layer is called the seed coat. This hard layer bursts open and a baby plant emerges from the seed. This baby plant grows into a healthy plant on receiving proper amount of sunlight, air, water and minerals from the soil.
Assignment:
Chapter 3: PLANTS
Date 3/06/2020
GENERAL SCIENCE
FLOWERS AND FRUITS
Now watch this video.
Flowers are the colourful structures attached to the stem. They make the plant look attractive.
Functions of Flowers
Flowers help in the reproduction of a plant.
Many flowers like the rose and jasmine provide us with perfumes.
Many flowers produce a sweet liquid called nectar, which is processed to make honey..
Some flowers change into fruits.
Flowers help in the reproduction of a plant.
Many flowers like the rose and jasmine provide us with perfumes.
Many flowers produce a sweet liquid called nectar, which is processed to make honey..
Some flowers change into fruits.
Fruits are the sweet edible part of a plant .
Fruits also contain a sweet fragrance.Not only human beings, but many birds and animals also eat fruits. Fruits are formed from flowers.They contain seeds. The number of seeds are different in every fruit.
Fruits store the food material. It contain the seeds. These seeds give rise to a new plant when it falls to the ground or when we plant them.
Complete the following exercises in your SCIENCE - OCB
Ex-A: Answer the following questions: Hints are highlighted above.
1) What are the functions of flowers?
2) What are the functions of Fruits?
3) Name two flowers that give us perfume.
Ex-B: Fill in the blanks with given options.
(veins, flowers, stem, important, roots)
1) Each plant part has an __________ task to do.
2) _______ holds the plant firmly to the soil.
3) _______ holds the leaves and flowers.
4) The vessels which carry water to the leaf are called _________.
5) __________ make the plant look attractive.
2) What are the functions of Fruits?
3) Name two flowers that give us perfume.
Ex-B: Fill in the blanks with given options.
(veins, flowers, stem, important, roots)
1) Each plant part has an __________ task to do.
2) _______ holds the plant firmly to the soil.
3) _______ holds the leaves and flowers.
4) The vessels which carry water to the leaf are called _________.
5) __________ make the plant look attractive.
Date 4/06/2020
GENERAL SCIENCE
SEEDS
Seeds are the hard structures present in a fruit. Seed contain a tiny baby plant in it.This baby plant in the seed is protected by the seed coat.
TYPES OF SEEDS
Edible seeds: Seeds of some plants can be eaten. Such seeds are called edible seeds, like wheat and gram.
TYPES OF SEEDS
Edible seeds: Seeds of some plants can be eaten. Such seeds are called edible seeds, like wheat and gram.
Assignment:
Complete the following exercises in your SCIENCE-OCB
Ex- A. Answer the following questions. Hints are highlighted above.
1) What is a seed ? What does it contain?
2) What does a baby plant need in order to grow?
Ex-B. Give one word for the following:
1) Substances absorbed from the soil-
M__________.
2) A hard and woody stem is known as-
T_________
3) Leaves breathe through-
S___________
4) Sweet liquid produced by a flower-
N__________
5) Hard substances present in fruit-
S_________.
Ex- A. Answer the following questions. Hints are highlighted above.
1) What is a seed ? What does it contain?
2) What does a baby plant need in order to grow?
Ex-B. Give one word for the following:
1) Substances absorbed from the soil-
M__________.
2) A hard and woody stem is known as-
T_________
3) Leaves breathe through-
S___________
4) Sweet liquid produced by a flower-
N__________
5) Hard substances present in fruit-
S_________.
Date 5/06/2020
GENERAL SCIENCE
Assignment:
Complete the following exercises in your SCIENCE-OCB
Ex-1. Tick the right option.
1) Which flowers give us perfume?
a) Rose b) Cauliflower
2) Which among the following is a fibrous root?
a) Rice b) Cotton
3) Which among the following is a root?
a) Potato b) Carrot
4) Which seed is edible?
a) Corn seed b) Orange seed
5) Leaves contain
a) Stomata b) Flower
Ex-2. Write True or False:
1) All plants have the same structure.
2) Roots help a plant to absorb water and minerals from soil.
3) Roots are of ten types.
4) Roots can never be used for eating.
5) Stomata are present in seeds.
Chapter 3: PLANTS
Assignment: Complete all exercises in your SCIENCE-OCB
1) Helps our body to make blood.
2) The sweetest stem.
3) Used for making chips.
4) Nectar is found in...
5) A root that rabbit like.
Chapter 3: PLANTS
Assignment: Complete the following exercises in your SCIENCE-OCB
Birds have light bodies .They have well formed wings attached to their body with the help of strong muscles. A bird flaps its wings in both directions, upward and downward direction, this allows it to fly.
The upward movement of the wings is known as the upstroke and the downward movement of the wings is known as the downstroke.
Feathers are small hair like structures . They keep the body warm. They are of different colours and are very large in number.
Wings are the large structures attached to the body with the help of strong muscles. Wings help the bird to fly.
Chapter 4 BIRDS AND THEIR BEAKS
FEATHERS
A bird's body is covered with feathers. Each bird has different kinds of feathers.
1) Body feathers: Feathers which are small and of different colours and cover the body of birds are known as body feathers.
2) Down feathers: These feathers are fluffy and soft. They keep the body warm.
3) Flight feathers: These feathers are long and found mainly on the wings . They help the bird to fly.
Some birds like the ostrich and penguin cannot fly because they are too heavy to fly.
Some birds can swim in water and are known as aquatic birds.
Ex-6) Write whether each statement is true or false:
4) Broad and flat beak:
5) Strong and chisel shaped beak:
Birds like woodpecker have this type of beak.
It helps the woodpecker to make holes in tree trunk and catch insects for its food.
6) Broad and short beak:
Birds like swallow have broad and short beak.Its beak is sticky from inside .
7) Broad, long and pointed beak:
Birds like kingfisher and storks have this type of beak to catch fish and rivers from ponds.
5) Give one example for the following:
6) Tick the correct answer.
Chapter 4 BIRDS AND THEIR BEAKS
F) Write True or False.
Name any four birds that you can identify from the picture.
Largest egg belongs to the Ostrich.
2.Climbing Birds
3.Preying Birds
4.Scratching Birds
5. Wading Birds
6.Swimming Birds or Aquatic Birds
Assignment:
Vulture's Nest
Owl's Nest
Gorillas build a new nest with leaves and branches every night.
Peacock is the national bird of India.
Kiwi is the national bird of New Zealand .It cannot fly. Kiwis have nostrils at the end of their beaks.
Chapter 5 BIRDS AND THEIR CLAWS
Do No.1 to 3 on page No. 49.
2. Write whether each statement is true or false.
3. Complete the following by supplying the missing words.
4.Fill in the blanks to complete the sentence.
5. Match the following birds:
Chapter 5 BIRDS AND THEIR CLAWS
1. Unscramble the words to reveal the names of birds.
2. Write whether each statement is true or false.
Chapter 5 BIRDS AND THEIR CLAWS
A. Tick the right option:
B. Fill in the blanks with given options:
Chapter 5 BIRDS AND THEIR CLAWS
Chapter 5 BIRDS AND THEIR CLAWS
Chapter 5 BIRDS AND THEIR CLAWS
Assignment:
A cockroach has a set of antennae which helps it to locate it's food, helps in movement.
Insects like butterflies have a long sucking tube in their mouth called proboscis. A butterfly uses this tube to suck nectar from a flower.
Most insects have two pairs of wings. In certain cases there is only one pair of wings as that of a housefly.
Some insects don't have wings. Ants and lice are wingless insects.
Insects breathe through tiny air holes called spiracles present on the body surface.
Small creatures that look like insects but are not insects. There are many creatures which look like insects but actually they are not insects. Spiders, scorpions, centipedes, millipedes, snails, earthworms etc. are such creatures commonly seen around us. But these are not put under the category of insects.
The social life of such insects is very well organised. Each member of the community has definite work to do. Like us, ants divide the work of the colony among them.
Queen ant: Queen ant spends all her life in laying eggs.
Male ants: A few winged male ants help the queen ants in laying eggs.
Female worker ants: Thousands of wingless female worker ants gather food, take care of eggs and maintain the colony
Life-cycle of a Butterfly
Assignment: Complete the following in your Science-OCB
USEFUL lNSECTS
Some insects are useful to us. They help us in many ways.
Honeybees collect nectar from flowers. They store it as honey. The beehive is made of wax, thus, we can say that wax is also produced by bees.
Some insects like butterflies, bees etc.help in pollination.
We get silk from the pupa of silk moth.
Many insects act as useful scavengers.They eat up dead animals and plants.
Harmful lnsects
Insects like grasshoppers, beetles, locust etc. damage our crops, vegetables and fruits. They are called pests.
Mosquitoes spread diseases like malaria, filaria, yellow fever etc.
White ants, silver fish, cloth moths feed on the wood, paper and clothes in our homes. Thus,they cause damage to our household things.
Simple steps to get rid of unwanted insects:
Hair should be kept clean by washing and regular combing. This keeps hair healthy and free of head lice.
Moth balls or dried neem leaves should be kept with silk or woollen clothes. They keep insects away.
We should spray chemicals like D.D.T. and other insecticides in places where insects live.
Assignment:
Do No. 1 to 4 on page No.59.
1. Unscramble the letters to make meaningful words.
2. The long tube by which butterflies sucks nectar is.
1. Unscramble the letters to make meaningful words.
2. Write whether the given statements are true or false.
a) All insects have three pairs of legs.
b) The body of an insect is divided into four parts.
c) The insects that live together in colonies or communities. They are called social insects.
3. Fill in the blanks from the options given below:
{lice, pests, insects}
a) Chemicals like D.D.T and other insecticides should be sprayed to kill _______.
b) Hair should be kept clean by washing and regular combing to keep free from head________.
c) Harmful insects that damage our crops are called __________.
4. Name three diseases caused by mosquitoes.
Do Exs A and B on page No. 63 and 64.
Ex-1. Tick the right option.
1) Which flowers give us perfume?
a) Rose b) Cauliflower
2) Which among the following is a fibrous root?
a) Rice b) Cotton
3) Which among the following is a root?
a) Potato b) Carrot
4) Which seed is edible?
a) Corn seed b) Orange seed
5) Leaves contain
a) Stomata b) Flower
Ex-2. Write True or False:
1) All plants have the same structure.
2) Roots help a plant to absorb water and minerals from soil.
3) Roots are of ten types.
4) Roots can never be used for eating.
5) Stomata are present in seeds.
Date 6/06/2020
GENERAL SCIENCE
Ex-1. Match the following:
Ex-2. Choose from the pictures and write the answers:
1)
|
Tap Root
|
a)
|
Butterfly
| |
2)
|
Fibrous Root
|
b)
|
Cotton
| |
3)
|
Edible seed
|
c)
|
Rice
| |
4)
|
Nectar
|
d)
|
Mango seed
| |
5)
|
Non-edible seed
|
e)
|
Wheat seed
|
1) Helps our body to make blood.
2) The sweetest stem.
3) Used for making chips.
4) Nectar is found in...
5) A root that rabbit like.
Date 8/06/2020
GENERAL SCIENCE
Ex 1) Draw and name the following parts of a plant.
Ex 2) Name them: Pictures are given as hints.
Date 9/06/2020
GENERAL SCIENCE
Chapter 4 BIRDS AND THEIR BEAKS
Now watch this video
Birds are beautiful creatures different from plants and animals.They are the animals with feathers. There are about 8600 species of birds.
Wings are the large structures attached to the body with the help of strong muscles. Wings help the bird to fly.
Assignment: Complete the following in your Science-OCB
Do No. 1 and 2 from Pg. No. 38.
Ex-1. Unscramble the words to reveal three terms related with feathers. The word will always begin with the green coloured alphabet.
a) L Y F F F U
b) F T S O
c) E R O O C L U D
Ex- 2 Tick the correct answer
Fluffy and soft feathers which keep the body of the bird warm are:
a) Body feathers
b) Down feathers
c) Flight feathers
Date 10/06/2020
GENERAL SCIENCE
FEATHERS
A bird's body is covered with feathers. Each bird has different kinds of feathers.
1) Body feathers: Feathers which are small and of different colours and cover the body of birds are known as body feathers.
2) Down feathers: These feathers are fluffy and soft. They keep the body warm.
3) Flight feathers: These feathers are long and found mainly on the wings . They help the bird to fly.
Some birds like the ostrich and penguin cannot fly because they are too heavy to fly.
Assignment: Complete the following in your Science-OCB
Page No. 38, Do Nos. 3, 5 and 6.
Ex-3) Fill in the blanks with the words given below.
(Upward, aquatic, downward, feathers)
a) A bird flaps its wings in ______ and ______ direction.
b) A birds body is covered with _____.
c) Birds which can swim in water are known as _____ birds.
Ex-3) Fill in the blanks with the words given below.
(Upward, aquatic, downward, feathers)
a) A bird flaps its wings in ______ and ______ direction.
b) A birds body is covered with _____.
c) Birds which can swim in water are known as _____ birds.
Ex-5) Name the following bird:
a) All birds can fly.
b) The upward movement of a bird's wings is known as upstroke.
c) Feathers help a bird to fly.
d) Body feathers keep the bird warm.
Date 11/06/2020
GENERAL SCIENCE
Chapter 4 BIRDS AND THEIR BEAKS
Some birds can swim in water. Such birds are known as aquatic birds.
The features of aquatic birds:
1) Oil glands which keep their feathers water proof.
2) They have webbed feet which help them to swim in water.
Most birds have streamlined bodies which help them to move easily through the air.
Birds help in dispersal of seeds. They support our ecosystem and helps it to function smoothly.
*Dispersal means spreading
*Dispersal means spreading
BEAKS OF BIRDS
As we have a mouth to eat, birds have beaks. The beak of bird is designed according to the food it eats. Thus, the shape of the beak will vary from bird to bird. Some birds use their beak to protect themselves from their enemies.
Assignment: Complete the following in your Science-OCB
On page No. 41, do Nos. 1 and 2.
1) Unscramble the words to reveal the name of birds. The word will always begin with the blue coloured alphabet.
a) R O W R S P A
b) L L W O A W S
c) L W O
2) Write whether each statement is true or false.
a) Woodpecker has a hard, chisel shaped beak.
b) Hawks and Owls have flat beaks.
Date 12/06/2020
GENERAL SCIENCE
Chapter 4 BIRDS AND THEIR BEAKS
Types of beaks
1) Small, hard and pointed beaks:
Birds like parrot and pigeon which eat grains, seed and crack nuts have small, hard and pointed beaks.
2) Curved beaks:
Birds like parakeet have curved beak. This curved beak helps it to crack nuts and hard fruits. It also helps it to climb.
3) Strong, sharp and hooked beaks:
Birds like eagles, vultures, kites, owls and hawks have strong, sharp and hooked beaks for eating the flesh of small birds.4) Broad and flat beak:
Birds like ducks have broad and flat beaks. Such beaks help them to dig in soft mud and find worms for its food.
5) Strong and chisel shaped beak:
Birds like woodpecker have this type of beak.
It helps the woodpecker to make holes in tree trunk and catch insects for its food.
6) Broad and short beak:
Birds like swallow have broad and short beak.Its beak is sticky from inside .
7) Broad, long and pointed beak:
Birds like kingfisher and storks have this type of beak to catch fish and rivers from ponds.
Assignment: Complete the following in your Science-OCB
Do nos. 3, 4, 5 and 6 on page No.41,.
3) Complete the following by filling in the blanks from the words given below.
{Chisel, grain , curved, pointed}
a) Sparrows and pigeons are ______ eating birds.
b) ______ beak helps to crack nuts and hard fruits.
c) Woodpeckers have hard _______ shaped beaks.
d) Kingfisher have broad, long and ______ beaks.
4) Encircle the odd one out.
4) Encircle the odd one out.
Owl , Vultures, Eagle , Hawk, Duck.
5) Give one example for the following:
a) Fish catching bird : ___________
b) Fruit eating bird : ___________
6) Tick the correct answer.
Which of the following has a broad and flat beak
a) Duck
b) Eagle
c) Swallow
d) Parakeet
Date 13/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do Exs. A and B on page No. 42 and 43
A) Tick the right option.
1) The bodies of birds are
a) Light. b) Heavy
2) The large number of hair like structures present on the body of birds are
a) Feathers. b) Wings
3) Birds which can swim in water are called
a) Swimmers. b) Aquatic birds
4) Parrots have _______ type of beaks.
a) Curved. b) Pointed
5) Hooked beak is present in
a) Sparrow. b) Eagle
B) Fill in the blanks with the given options.
{Protect, wings, webbed, pointed, beaks}
1) _______ are the large structure attached with the help of strong muscles.
2) Aquatic birds have ________ feet which help them to swim in water.
3) Kingfisher has broad, long and________ beak.
4) The _________ of birds are designed according to the food it eats.
5) Some birds use their beaks to _______ themselves from enemies.
Date 15/06/2020
GENERAL SCIENCE
Chapter 4 BIRDS AND THEIR BEAKS
Assignment: Complete the following in your Science-OCB
Do Exs. Cand D on page No. 43.
C) Give one word for the following:
1) Small hair like structures present on birds body.
F_________.
2) Helps the bird to fly.
W ______.
3) Upward movement of the wings.
U _________.
4) Fluffy and soft feathers which keep the birds warm.
D _________________.
5) Birds which swim in water.
A ________.Date 16/06/2020
GENERAL SCIENCE
Chapter 4 BIRDS AND THEIR BEAKS
Assignment: Complete the following in your Science-OCB
Do Exs. E and F on page No. ,43 and activity on page No. 44
1) Wings keep the birds warm.
2) Eagles have small, hard and pointed beaks.
3) Aerial birds have webbed feet to hold branches.
4) Swallow has a sticky beak.
5) Down feathers are fluffy and soft.
1.________ 3. ________
2. ________ 4. ________
Date 17/06/2020
GENERAL SCIENCE
Chapter 5 BIRDS AND THEIR CLAWS
NOW WATCH THE VIDEO.
How do we walk? We have feet to stand and to walk. The birds normally fly but sometimes they stand on there claws to eat grains and the food stuff they like. They hold the branches with their claws and even protect themselves with their claws. The claws of birds help them in number of ways:
Help the birds to hold the branch.
Help the birds to hold their prey.
Help the birds to climb up the trees.
Help the birds to walk and run on the ground.
Help the birds to scratch for seeds and worms.
Different birds have different types of claws.It actually depends on the functions which a bird has to perform. The functions can vary with food habits, type of nests it makes and the type of locomotion or movement.
The main function of feet and claws is protecting themselves from their enemies and moving about. Depending upon the structure of claws, the birds can be classified as
Perching birds, Scratching birds, Climbing birds, Wading birds, preying birds, Swimming birds.
Do you know?
The smallest bird is the hummingbird.Largest egg belongs to the Ostrich.
Assignment:
Read page No. 46 of Chapter 5.
Date 18/06/2020
GENERAL SCIENCE
Chapter 5 BIRDS AND THEIR CLAWS
1.Perching birds
Birds like the Crow, Sparrow etc.perch and hop on the branches. They have three toes in front and one at the back.Such toes help them to hold the branches firmly.They hop on the ground and can even sleep while perching.
Birds like the woodpecker and parrot have two toes pointing upwards and two downwards. Such toes help them to climb up the trees.
Birds like eagles,hawks etc.have strong and sharp claws to catch and hold their prey.The claws of preying birds are called talons.
Birds like hens use their claws to scratch the earth for seeds and worms.Such birds are called scratching birds.They have sharp and hard claws with three toes in front and one at the back.These birds can both walk and run on the ground.
Birds like cranes, herons walk in shallow water especially in search of food. Such birds are called wading birds. These birds have long legs and wide spreading toes. These toes keep the feet from sinking in the soft mud.
Birds like ducks and swans swim in water.Such birds are called swimming or aquatic birds.These birds have webbed feet.These feet help them to paddle and push water while swimming.
Read page No. 47 and 48 of Chapter 5.
Date 19/06/2020
GENERAL SCIENCE
Chapter 5 BIRDS AND THEIR CLAWS
NOW WATCH THE VIDEO.
Nests of birds
As we all live in a house. Birds live in a nest.Nest is the dwelling place of a bird. They build their nest to lay eggs and keep their young ones safe and warm.
Dwelling: A house or other place of residence.
Different birds have different type of nests. The nest differ in the shape, size and nature of material used for building the nest.
Bulbuls Nest
Bulbuls build their nest in hedges and bushes with the help of grass. The nest looks like a deep cup.
Tailor Birds Nest
A weaver bird uses its beak to sew big leaves together with the help of thread, wool etc ., to make a cosy nest.
Woodpecker's Nest
Woodpeckers make a hole into the trunk of a tree. This hole is used as a nest.
Vulture's Nest
Vultures use sticks to make big nests in tall trees.
Owl's Nest
Owl's make their nest in the hollow of a tree .The nest is lined with feathers and grass.
Gorillas build a new nest with leaves and branches every night.
Koel is a lazy but a clever bird .It doesn't make its own nest. It lays eggs in crow's nests. The mother feeds the Koel's children along with her own children as both look alike.
Kiwi is the national bird of New Zealand .It cannot fly. Kiwis have nostrils at the end of their beaks.
Assignment:
Read page No. 50 and 51 of Chapter 5.
Date 20/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do No.1 to 3 on page No. 49.
1. Unscramble the words to reveal the type of birds.
a) E H I G P R C N
b) L I B I N C M G
c) G Y E P N I R
2. Write whether each statement is true or false.
a) The claws of preying birds are known as Talons.
b) Parakeet is a scratching bird.
c) Hens have sharp and hard claws.
d) Eagles and hawks hold their prey with their claws.
3. Complete the following by supplying the missing words.
{three, one, hold, hop, perch}
Birds like crows, sparrows etc. _______ and ______ on the branches.They have _______ toes in front and ________ toe at the back. Such toes help them to __________ the branches firmly.
Date 22/06/2020
GENERAL SCIENCE
Chapter 5 BIRDS AND THEIR CLAWS
Assignment: Complete the following in your Science-OCB
Do No. 4 to 6 on page No. 49.
4.Fill in the blanks to complete the sentence.
Cranes walk in water in search of ________ .
The legs of cranes are __________ and the toes are _________ spread.
5. Match the following birds:
1. Scratching bird. Eagle
2. Preying bird Hen
3. Swimming bird Parrot
4. Climbing bird Duck
6. Tick the right answer.
A sparrow is a:
a) wading bird
b) swimming bird
c) preying bird
d) perching bird
Date 23/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do No. 1 to 4 on page No. 52
1. Unscramble the words to reveal the names of birds.
a) L L U U B B
b) R V W E E A
c) L O W
2. Write whether each statement is true or false.
a) Bulbuls sew big leaves together to make nests.
b) Aa birds make same type of nests.
c) Bulbuls nest look like a deep cup.
d) Woodpecker makes a hole into the trunk of a tree.
3. Complete the sentences by filling in the blanks.
{Cup, weaver, nests, grass, koel.}
{Cup, weaver, nests, grass, koel.}
________ are homes to many birds. Birds use many materials like _________ and twigs to make their nests. The most beautiful nest is made by the _________ bird. The nest of bulbul looks like a deep _______. But some clever birds like the __________ do not make their nest and use others nest.
4. Encircle the odd one out:
HINT: The bird doesn't make its own nest.
Koel, Bulbul, Vulture, Tailor bird, Woodpecker.
Date 24/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do Exs. A and B on page No. 53 and 54.
A. Tick the right option:
1. The laziest bird is:
a) Crow b) Koel
2. Which bird uses sticks to make big nests?
a) Eagle be) Vulture
3. Which bird sews big leaves together?
a) Tailor bird b) Koel
4. Which animal makes a nest every night?
a) Gorilla b) Monkey
5. The smallest bird is:
a) Hummingbird b) Sparrow
B. Fill in the blanks with given options:
{enemies, webbed, ostrich, kiwi, peacock}
1. Largest egg belongs to ________.
2. National bird of New Zealand is ________.
3. ________ is the national bird of India.
4. Swimming birds have _______ feet.
5. The feet and claws protect birds from their _______.
Date 25/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do Exs. C and D on page No. 54.
C. Give one word for the following.
1. Birds with two toes pointing upwards and two downwards
P ___________.
2. Claws of preying birds are called
T___________.
3. National bird of India
P ________.
4. Type of feet of the duck
W _________.
5. Birds which use holes as a nest
W ___________.
Date 26/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do Exs. E and F on page No. 54.
F. Write True or False:
1. Hummingbird is the smallest bird.
2. Kiwis have nostrils at the end of their beaks.
3. Kiwis and Penguins can fly very fast.
4. Ducks are known as perching birds.
5. Cranes scratch in mud for insects.
Date 29/06/2020
GENERAL SCIENCE
Assignment: Complete the following in your Science-OCB
Do this activity and fun file on page No. 55
Activity: Write all the bird's names that you can see in the picture.
Date 30/06/2020
GENERAL SCIENCE
Chapter 6 Insects
NOW WATCH THE VIDEO.
Insects are usually the small creatures that we often see in our surroundings. Most of the insects have wings which are not very muscular. Thus, there is a limitation for their flight. Some of the common insects which we come across in our daily lives are ants, beetles, bees, flies, mosquitoes and cockroaches.
Insects are usually the small creatures that we often see in our surroundings. Most of the insects have wings which are not very muscular. Thus, there is a limitation for their flight. Some of the common insects which we come across in our daily lives are ants, beetles, bees, flies, mosquitoes and cockroaches.
PARTS OF AN INSECTS BODY
Most of the insects have six legs. The body of an adult insect is divided into three parts: head, thorax and abdomen
Insects have antennae on their head. This antennae is a thin whip like structure which helps the insect to smell and feel. Most of the insects have wings. These wings do not have strong flight muscles, hence they fly only for short intervals and short distance. Insects have a hard outer covering, called chitin on their body.
Read page No. 57 of Chapter 6.
01 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Insects like butterflies have a long sucking tube in their mouth called proboscis. A butterfly uses this tube to suck nectar from a flower.
Most insects have two pairs of wings. In certain cases there is only one pair of wings as that of a housefly.
Some insects don't have wings. Ants and lice are wingless insects.
Insects breathe through tiny air holes called spiracles present on the body surface.
Small creatures that look like insects but are not insects. There are many creatures which look like insects but actually they are not insects. Spiders, scorpions, centipedes, millipedes, snails, earthworms etc. are such creatures commonly seen around us. But these are not put under the category of insects.
Assignment:
Read page No. 58 of Chapter 6.
02 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
SOCIAL lNSECTS
Some insects live together in colonies or communities. They live in societies like man. They are called social insects. Ants and bees are social insects.
Some insects live together in colonies or communities. They live in societies like man. They are called social insects. Ants and bees are social insects.
Queen ant: Queen ant spends all her life in laying eggs.
Male ants: A few winged male ants help the queen ants in laying eggs.
Female worker ants: Thousands of wingless female worker ants gather food, take care of eggs and maintain the colony
A butterfly completes its life cycle in four stages: egg, larva (caterpillar), pupa and adult
Butterflies lay eggs on plant leaves.
Eggs hatch to produce larva. It is also called caterpillar. It is very different from the adult butterfly.
Larva/ Caterpillar moulds to form pupa.
Pupa changes to adult butterfly.
Read page No.60 of Chapter 6.
03 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
NOW WATCH THE VIDEO.
Honeybees collect nectar from flowers. They store it as honey. The beehive is made of wax, thus, we can say that wax is also produced by bees.
Some insects like butterflies, bees etc.help in pollination.
We get silk from the pupa of silk moth.
Many insects act as useful scavengers.They eat up dead animals and plants.
Harmful lnsects
Mosquitoes spread diseases like malaria, filaria, yellow fever etc.
White ants, silver fish, cloth moths feed on the wood, paper and clothes in our homes. Thus,they cause damage to our household things.
Simple steps to get rid of unwanted insects:
Hair should be kept clean by washing and regular combing. This keeps hair healthy and free of head lice.
Moth balls or dried neem leaves should be kept with silk or woollen clothes. They keep insects away.
We should spray chemicals like D.D.T. and other insecticides in places where insects live.
Read page No.61 of Chapter 6.
06 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCB
Do No. 1 to 4 on page No.59.
1. Unscramble the letters to make meaningful words.
- E I S P C A R L S
- E E E C N T I P D
- S A N I L
2. The long tube by which butterflies sucks nectar is.
a) Spiracle
b) Centipede
c) proboscis
d) cockroach
3. Fill in the blanks from the options given below:
{Spiracles, ants, louse, antennae}
a) ________ and _________ are wingless insects.
b) lnsects breathe through tiny holes called _______.
c) A Cockroach has a set of _______.
4. Write whether the given statements are true or false.
a) The body of an insect is divided into four parts.
b) Ants and louse have big wings.
c) Centipede and millipede are not insects.
d) Scorpions have long sucking tube to suck nectar.
07 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCB
Do No. 1 to 4 on page No.62.
07 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCBDo No. 1 to 4 on page No.62.
- P E A C T R L L I R A
- O O C C O N
- P P A U
2. Write whether the given statements are true or false.
a) All insects have three pairs of legs.
b) The body of an insect is divided into four parts.
c) The insects that live together in colonies or communities. They are called social insects.
3. Fill in the blanks from the options given below:
{lice, pests, insects}
a) Chemicals like D.D.T and other insecticides should be sprayed to kill _______.
b) Hair should be kept clean by washing and regular combing to keep free from head________.
c) Harmful insects that damage our crops are called __________.
4. Name three diseases caused by mosquitoes.
a) __________
b) __________
c) ___________
08 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCBDo Exs A and B on page No. 63 and 64.
A. Tick (√) the right option.
1. The hard covering present on the surface of the insects.
a) cuticle b) chitin.
2. Which of the following is not an insect?
a) millipede b) cockroach
a) millipede b) cockroach
3. The feelers present on the cockroach are known as
a) antennae. b) proboscis
4. Which of the following is a social insect
a) ant b) millipede
5) Insects breathe through tiny holes known as
a) spiracles. b) proboscis
B. Fill in the blanks with the given options.
antennae, pests, queen, cuticle, social insects.
antennae, pests, queen, cuticle, social insects.
1. Butterflies use their ________ for smelling and feeling.
2. A hard protective covering of an insect is called __________ .
3. The _________ ant spends all her life in laying eggs.
4. Insects that live together in colonies or communities are known as ___________.
5. The insects that damage our crops are known as ________ .
Do Exs C and D on page No.64.
Do this activity on page No.65 and Revise chapter 1 for Self Assessment Test (SAT).
A. Tick [√] the right option:
B. Fill in the blanks:
Assignment: Complete the following in your Science-OCB
A. Write True or False:
B. Unscramble the words :
C. Encircle the odd one out:
Assignment: Complete the following in your Science-OCB
A. With respect to skeletal system answer the following questions:
B. Name the systems shown in the picture:
A) ________________
Assignment: Complete the following in your Science-OCB
09 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCBDo Exs C and D on page No.64.
10 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCB
Do Exs E and F on page No.64.
13 / JULY / 2020
GENERAL SCIENCE
Chapter 6 lNSECTS
Assignment: Complete the following in your Science-OCBDo this activity on page No.65 and Revise chapter 1 for Self Assessment Test (SAT).
14 / JULY / 2020
GENERAL SCIENCE
SELF ASSESSMENT TEST
Complete the following in your Science-OCBA. Tick [√] the right option:
1. Building blocks of our body are
a) Cells b) Tissues
2. Kidney is an example of
a) Tissue b) Organ
3. Size of which organ remain same throughout life.
a) Eye b) HeartB. Fill in the blanks:
1. Breaking down of complex food into simple food is known as _________ .
2. The _________ system is composed of heart, blood and blood vessels.
C. Give one word for the following:
1. Number of cells join together to form
T _______.
2. Number of bones in our body
2 ____.
3. The process which releases energy in our body
R __________.
Assignment: Revise Chapter 1 for SAT.
15 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 1
A. Write True or False:
1. Undigested food pass out through the anus.
2. Lungs are the main pumping Organ.
3. Kidneys are the part of our nervous system.
4. Skeleton gives shape and support to our body.
B. Unscramble the words :
- N R A G O
- S S E T I U
- K E E T S L N O
- E I T G I D E S V
Kidney, Tissue, Cell, Man, Bricks, Excretory system.
16 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 1A. With respect to skeletal system answer the following questions:
1. Two functions of the skeletal system.
2. How many bones are there in our body?
3. What is the bony framework of our body called?
B. Name the systems shown in the picture:
A) ________________
B) _______________.
C) _______________.
17 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 1
20 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 1
Assignment: Revise all Exs of Chapter 1 for Self Assessment Test (SAT ) tomorrow (21/7/2020)
a) U L G N S
b) H N I E L A
c) H S A T A M
d) G O C U H
e) E E E S N Z
B. Write whether the given statements are true or false.
a) Breathing takes place in the morning.
b) The air we inhale contains a lot of carbon dioxide.
c) Breathing rate is the number of times you breathe in and out.
d) Common cold results when you feel really cold.
A. Tick (√) the right option:
1. Respiration takes place inside
a) the lungs b) the body cells.
2. The process of taking in of air is known as
a) inhalation b) exhalation.
3. How many bronchi are there?
a) two b) three
4. Our body needs which gas for respiration?
a) Oxygen b) Carbon dioxide
B. Fill in the blanks:
1. Breathing _______ after vigorous exercise.
2. Too much of _________ food leads to obesity.
3. Common cold is a ________ disease.
4. Air pollution effects our _______ system the most.
A. Give one word for the following:
1. The spongy, elastic, bag like structure.
L__________.
2. The gas released during respiration.
C __________.
3. Nasal discharge is observed during.
C __________.
4. The passage that originates from the nose.
N__________.
B. Label the following diagram:
B. Write True or False:
1. Our body needs energy to work.
2. Breathing is a non continuous process.
3. Asthma is an allergic disorder of lungs.
4. The process of taking in of air is known as exhalation.
Chapter 3
Assignment: Do the following in your Science- OCB
A. Unscramble the words:
R W E L F O
E A F L
E S T M
T U I R F
B. Write whether each statement is true or false:
1. The part of the plant which remains underground is known as shoot.
2. Weak stems hold the plant upright.
3. Pulp is the hard structure present in a fruit.
4. Leaf makes the plant look attractive.
Assignment:
Revise chapter 3 carefully and Do the following in your Science- OCB.
A. Answer the following questions:
1. Which stem cannot hold the plant?
2. What are hard and woody stems known as?
3. Which stems can prepare food?
4. Name any flower that yields perfume.
5. Where are stomata present?
6. What are the vessels which carry water to leaf known as?
B. Fill in the blanks:
1.________ holds the plant firmly to the soil.
2. _______ holds the leaves and flowers.
3. _________ makes the plant look attractive.
Assignment: Do the following in your Science- OCB.
A. Give one word for the following:
1. Substances absorbed from soil.
M _________ .
2. Leaves breathe through
S __________ .
3. Sweet liquid produced by flower
N _________ .
4. Hard substances present in fruit.
S _________ .
L Y F F F U
F T S O
R O W R S P A
L W O
B. Write whether each statement is true or false:
1. All birds can fly
2. Feathers help a bird to fly.
3. Wood peckers have a hard, chisel shaped beak.
4. Hawks and owls have flat beaks.
Assignment: Do the following in your Science- OCB.
A. Tick the right option:
21 / JULY / 2020
GENERAL SCIENCE
General Instructions:-
1. Read the questions carefully.
2. Each answer is of one mark.
3. Click on the submit button after completing the test.
4. THE TEST MUST BE COMPLETED IN 15 MINUTES.
Note:- It is mandatory to write your name and four digit registration number.
22 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 2
A. Unscramble the letters to reveal the words:a) U L G N S
b) H N I E L A
c) H S A T A M
d) G O C U H
e) E E E S N Z
B. Write whether the given statements are true or false.
a) Breathing takes place in the morning.
b) The air we inhale contains a lot of carbon dioxide.
c) Breathing rate is the number of times you breathe in and out.
d) Common cold results when you feel really cold.
23 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 2
1. Respiration takes place inside
a) the lungs b) the body cells.
2. The process of taking in of air is known as
a) inhalation b) exhalation.
3. How many bronchi are there?
a) two b) three
4. Our body needs which gas for respiration?
a) Oxygen b) Carbon dioxide
B. Fill in the blanks:
1. Breathing _______ after vigorous exercise.
2. Too much of _________ food leads to obesity.
3. Common cold is a ________ disease.
4. Air pollution effects our _______ system the most.
24 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 2
1. The spongy, elastic, bag like structure.
L__________.
2. The gas released during respiration.
C __________.
3. Nasal discharge is observed during.
C __________.
4. The passage that originates from the nose.
N__________.
B. Label the following diagram:
27 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 2
A. Match the following:
1. Lungs. a) contain hairs
2. Nostrils. b) contraction of size of chest.
3. Obesity. c) main respiratory organ.
4. Germs. d) too much of fatty foods.
5. Exhalation. e) cause disease.
1. Our body needs energy to work.
2. Breathing is a non continuous process.
3. Asthma is an allergic disorder of lungs.
4. The process of taking in of air is known as exhalation.
28 / JULY / 2020
GENERAL SCIENCE
Revision
Assignment: Do the following in your Science- OCB
A. Unscramble the words:
R W E L F O
E A F L
E S T M
T U I R F
B. Write whether each statement is true or false:
1. The part of the plant which remains underground is known as shoot.
2. Weak stems hold the plant upright.
3. Pulp is the hard structure present in a fruit.
4. Leaf makes the plant look attractive.
29 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 3
A. Answer the following questions:
1. Which stem cannot hold the plant?
2. What are hard and woody stems known as?
3. Which stems can prepare food?
4. Name any flower that yields perfume.
5. Where are stomata present?
6. What are the vessels which carry water to leaf known as?
30 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 3
Assignment: Do the following in your Science- OCB.
A.Tick the ( √ ) option:1.________ holds the plant firmly to the soil.
2. _______ holds the leaves and flowers.
3. _________ makes the plant look attractive.
31 / JULY / 2020
GENERAL SCIENCE
Revision
Chapter 3
A. Give one word for the following:
1. Substances absorbed from soil.
M _________ .
2. Leaves breathe through
S __________ .
3. Sweet liquid produced by flower
N _________ .
4. Hard substances present in fruit.
S _________ .
B. Name the following parts.
04 / AUG / 2020
GENERAL SCIENCE
Revision
Chapter 3
Assignment: Do the following in your Science- OCB.
A. Write True or False:
1. All plants have the same structures.
2. Roots are of ten types.
3. Roots can never be used for eating.
4. Stomata are present in seeds.
B. Match the following terms with the pictures:
A. Write True or False:
1. All plants have the same structures.
2. Roots are of ten types.
3. Roots can never be used for eating.
4. Stomata are present in seeds.
B. Match the following terms with the pictures:
05 / AUG / 2020
GENERAL SCIENCE
Revision
Chapter 4
Assignment: Do the following in your Science- OCB.
A. Unscramble the words:L Y F F F U
F T S O
R O W R S P A
L W O
B. Write whether each statement is true or false:
1. All birds can fly
2. Feathers help a bird to fly.
3. Wood peckers have a hard, chisel shaped beak.
4. Hawks and owls have flat beaks.
06 / AUG / 2020
GENERAL SCIENCE
Revision
Chapter 4
A. Tick the right option:
1. The bodies of birds are
a) light b) heavy
2. Hooked beak is present in a
a) sparrow b) eagle
3. Birds which can swim in water are
a) swimmers b) aquatic birds
4. Parrot has a ______ type of a beak
a) curved b) pointed
B. Fill in the blanks:
1. Kingfisher has broad, long and _________ beak.
2. Some birds use their beaks to ________ themselves from enemies.
Assignment: Do the following in your Science- OCB.
A. Give one word for the following:
Assignment: Do the following in your Science- OCB.
A. Match the following terms with pictures:
B. Write True or False:
1. Wings keep the birds warm.
2. Swallow has a sticky beak.
3. Downfeathers are fluffy and soft.
4. Eagles have small, hard and pointed beaks.
Chapter 5
Assignment: Do the following in your Science- OCB.
A. Unscramble the words:
E H I G P R C N
G Y E P N I R
L L U U B B
R V W E E A
B. Write whether each statement is true or false:
1. Parakeet is a scratching bird.
2. Hens have sharp and hard claws.
3. All birds make the same type of nests.
4. Bulbul's nests look like a deep cup.
Chapter 4
Assignment: Do the following in your Science- OCB.
A.Tick the right option:
1. The laziest bird is
a) Crow b) Koel
2. Which bird sews big leaves together
a) Tailor bird b) Koel
3) Which animal makes a nest every night.
a) Gorilla b) Monkey
4. The smallest bird is the
a) Hummingbird b) Sparrow
B. Fill in the blanks:
1. Largest egg belongs to the __________.
2. National bird of New Zealand is the __________.
3. _________ is the national bird of lndia.
4. Swimming birds have _________ feet.
07 / AUG / 2020
GENERAL SCIENCE
Revision
Chapter 4
A. Give one word for the following:
1. Helps the bird to fly.
W ___________.
2. Upward movement of the wings.
U ____________.
3. Birds which swim in water.
A ____________.
B. Name the beaks shown in the figures.
10 / AUG / 2020
GENERAL SCIENCE
Revision
Chapter 4
A. Match the following terms with pictures:
1. Wings keep the birds warm.
2. Swallow has a sticky beak.
3. Downfeathers are fluffy and soft.
4. Eagles have small, hard and pointed beaks.
11 / AUG / 2020
GENERAL SCIENCE
Revision
Assignment: Do the following in your Science- OCB.
A. Unscramble the words:
E H I G P R C N
G Y E P N I R
L L U U B B
R V W E E A
B. Write whether each statement is true or false:
1. Parakeet is a scratching bird.
2. Hens have sharp and hard claws.
3. All birds make the same type of nests.
4. Bulbul's nests look like a deep cup.
13 / AUG / 2020
GENERAL SCIENCE
Revision
Assignment: Do the following in your Science- OCB.
A.Tick the right option:
1. The laziest bird is
a) Crow b) Koel
2. Which bird sews big leaves together
a) Tailor bird b) Koel
3) Which animal makes a nest every night.
a) Gorilla b) Monkey
4. The smallest bird is the
a) Hummingbird b) Sparrow
B. Fill in the blanks:
1. Largest egg belongs to the __________.
2. National bird of New Zealand is the __________.
3. _________ is the national bird of lndia.
4. Swimming birds have _________ feet.
Comments
Post a Comment