CBSE Class 3 Science Worksheet D

Read and download free pdf of CBSE Class 3 Science Worksheet D. Download printable Science Class 3 Worksheets in pdf format, CBSE Class 3 Science All Chapters Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 3 Assignments and practice them daily to get better marks in tests and exams for Class 3. Free chapter wise worksheets with answers have been designed by Class 3 teachers as per latest examination pattern

All Chapters Science Worksheet for Class 3

Class 3 Science students should refer to the following printable worksheet in Pdf in Class 3. This test paper with questions and solutions for Class 3 Science will be very useful for tests and exams and help you to score better marks

Class 3 Science All Chapters Worksheet Pdf

PRESSURE

Pressure

Pressure is the force of an object over another object acted over specific area.The force spreads over large area creates low pressure while the forces collect on small area and produce more pressure. Thus two objects of the same weight but different shape produces different amount of pressure.

Pressure of Solids

Everything has weight. Thus, weight produces pressure on another object it rests on. The pressure of a solid depends on its weight and shape. As the weight of the solid body increases its pressure also increases. As the weight of a solid

body decreases its pressure also decreases. Thus, we can conclude that the pressure of a solid body has a direct relationship with its weight/ force/. In addition to this, the pressure of solid body depends on the area over which it rests. As the area over which a solid body rests on increases, its pressure decreases. But as the area over which the solid body rests on decreases its pressure increases. Thus, the pressure of a solid body differs based on its shape.Therefore, we can conclude that the pressure of a solid body has an inverse relationship with the area of the body it rests on.

Two bodies of equal weight but having different shape produce different pressure

Pressure in Liquids

Like solids, liquids have weight. As a result of this weight liquids create pressure on the base and the walls of their container. The pressure of a liquid depends on the depth. The pressure created/produced/ by a liquid increases with increase in depth.

But the pressure of a liquid decreases with decrease in depth. Thus we can conclude that pressure of a liquid has direct relationship with depth.

pressure of liquid at different depth

Pressure in Gases

Like solids and liquids, gases occupy space. Air molecules fill up any empty spaces available indefinitely. They create pressure on the wall of lightly closed container.

Atmospheric Pressure

We live in an ocean of air. This ocean of air that covers the Earth is called atmosphere. It produces on everything its weight rests. We don’t feel this pressure because it acts on us equally in all directions.

We can’t see atmospheric air but we can confirm that it produces pressure on everything it rests on.

Uses of pressure

We use pressure for different purposes. Some of the uses of pressure are the following:

1. Nails are made on the principles of pressure. They have sharpened and pointed end. This decreases the area over which the nail rests on the wooden material. This means that sharpened and pointed end of the nail rests on small area.

Thus the force used to push the nail high pressure. This high pressure easily pushes the nail into the wood.

2. A knife is used to cut various objects. We sharpened when it gets blunt. A sharpened knife blade rests on small area of the object to be cut. Thus the force used to cut the object has high pressure. This high pressure enables us to cut the object easily.

3. The various cars and/ or machines, and equipment’s’ use the pressure created by liquids and gases. You might have seen these applications.

Pressure is used to/in

- inflate balloons - inflate football bladder

- inflate swimming tubes - inflate tires of vehicles

- syringes - water pump

- siphon - rubber Suckers

- hydraulic press - car brake

- Carburetor - city bus doors etc.

More questions-

I. Choose the correct option.

1. Name the animal which has long sticky tongue to catch insects.

butterfly lizards mosquito

2. Which one of these is a carnivore?

cheetah deer giraffe

3.Which of these birds have webbed feet?

eagle sparrow duck

4. Which of these feathers are used for flying?

flight feathers body feathers down feathers

5. Which of these birds migrate to India during winters?

eagles Siberian cranes woodpeckers

6. Where does Partridge make its nest?

on a tree branch on roofs of buildings amongst tall grass

II. Name the following.

1. Animals that have sharp pointed front teeth. ____________________

2. The claws of an eagle. ___________________

3. I have webbed feet that help me to paddle. ______________________

4. Birds have these instead of teeth. _____________________

5. A bird that stiches leaves to make its nest. _____________________

III. Write True or False. If False, rewrite the correct statement.

1. All animals do not depend on plants for their food.

_________________________________________________________________

2. Ostrich lays the biggest egg.

_________________________________________________________________

3. Birds are great travellers.

_________________________________________________________________

4. Once a bird makes its nest, it always lays eggs in the same nest.

__________________________________________________________________

IV. Answer the following questions.

1. How do snakes swallow animals larger than their size?

____________________________________________________________________

2. How do feathers help birds?

____________________________________________________________________

3. After the eggs are laid, what do bird do to make them hatch?

____________________________________________________________________

V. Look at the diagram and answer the given questions.

1. Identify the bird.
_______________________

2. What type of beak does it have?
___________________________________________

3. Why sparrows are called Omnivores?
_________________________________________________
_________________________________________________
_________________________________________________

VI. Give Reasons.
1. Why does every food chain begin with plants?
2. Why do birds build nests in places that are difficult to see or reach?

VII. Differentiate between the following.

Omnivores	Herbivores

Down Feathers	Body Feathers

Q.1 Name the following:

1. A bird which weaves grass in and out to make its nest._____________

2. Collects a few sticks to make a cup-shaped nest._____________

3. Its front toes are joined by skin. ._____________

4. Collects pebbles and stones to make a nest. ._____________

5. It makes its nest in the hollow of tree. ._____________

6. Uses its beak like a needle to sew leaves with materials like threads and wool.

7. cannot fly but can run at a speed of 70 km/hr. ._____________

8. A body part of a bird which act as a rudder of boat ._____________

9. A bird’s body is covered with it. ._____________

10. Birds built nest to lay._____________

Q.2 Give two examples for each:

1. Flesh eating birds: ._____________, ._____________

2. Perching bird: ._____________, ._____________

3. scratching bird: ._____________, ._____________

4. Climbing bird: ._____________, ._____________

5. Swimming bird: ._____________, ._____________

6. Wading bird: ._____________, ._____________

7. Wings movement: ._____________, ._____________

Q.3 Read the clues and unscramble the words:

1. It has short, hard and horny beaks to crush grains and seeds. P_G__ON_

2. It has strong and chisel shaped beak. W_ _ DP_C_ER.

3.It uses its beak like a needle to sew leaves to make nest. TA_ _ L_ _. B_ R _

4. It cover the body of birds. D_WN _ _ A _ HE _

Q.1 Define the following term.
1. Herbivores : 2. Carnivores
3. Omnivores: 4. Domestic animals :

Q.2 Answer the following in one word.
1. I have a long trunk to suck water and to have shower also.
2. I have a long sticky tongue catch insects.
3. I am herbivore and gives milk.
4. I suck the blood of other animals.
5. I am a bird and an omnivore.
6. I am domestic animal also known as the ship of desert.
7. I lap milk and water and also eat fish.
8. I am a grazing animal and chew cud.
9. I am herbivore and gnaw the food.
10. All food chains begin from it.

Q.3 Fill in the blanks.
1. Animals need food to_______ , to get energy and to stay _______.
2. _______and _______ are energy giving food.
3. _______and _______are milk producing food.
4. _______ have very sharp front teeth.
5. _______have very sharp, pointed and curved teeth.

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CBSE Class 3 Science All Chapters Worksheet

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Worksheet for Science CBSE Class 3 All Chapters

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All Chapters worksheet Science CBSE Class 3

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All Chapters CBSE Class 3 Science Worksheet

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Worksheet for CBSE Science Class 3 All Chapters

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