CBSE Class 3 Science Worksheet E

2. cyclonic/ frontal/ rain

This type of rain is formed when warm air rises in contact with a cold air mass.This means warm air in contact with cold air rises as it rises, it cools adiabatically. The moist air condenses and forms clouds. On further cooling the clouds combine to form big and heavy drops of water that finally fall as rain.

 

3. Orographic rain

Orographic rain is formed when moist air is lifted over mountain barriers. Then the air expands and cools adiabatically. At dew point temperature, it condenses and forms clouds. The clouds continued condensation and produce rain or snow.

2. Gold is used for making jewellery because it is

 

a) very expensive.

 

b) strong and shiny.

 

c) yellow in colour.

 

3. The light passes through a

 

a) glass window pane.

 

b) wooden door.

 

c) brick wall.

 

D. Answer the following questions. 

 

1. Why are shadows formed?

 

2. Name the products that we get from petroleum.

 

3. How is plastic harmful to us?

 

E. Give reason. 

 

1. We see a ‘No Horn’ Zone outside the hospitals.

 

2. We can’t make clothes with paper.

 

3. The earth looks like a blue ball from space.

 

F. Look at the picture and answer the following questions. 

 

a. The movement of Earth around the Sun is called _____.

 

b. It causes ___.

 

G. Differentiate the following terms. 

 

a. Axis and Orbit.

Q.1 Name the following:

1. Plants cannot make food with out this ___________

2. This animal breathes through gills ___________.

3. It grows from a seed_________.

4. Most plant breathe through tiny pores called_______.

5. Some plants grow from a part of plant like _______ and _________.

6.___________ plant eat insect.

Q.2 Differentiate between Plants and Animals.

Q.3 Draw a diagram to show that plants grow from seeds.

New Words ( copy New words twice in notebook)

1. grazing.     2. Chasing    3. Greedily
4. health        5. Grow         6. Herbivore
7. food chain 8. Carnivore  9. Omnivore
10. Chewing  11. Sucking  12. Oil-seed cake
13. grinding   14. Leeches.

Define the following terms:
1. Herbivore: Plants eating animal is known as herbivore.
2. Carnivore: Flesh eating animal is known as carnivore.
3. Omnivore: Animal that eat booth plants and animals is known as omnivore.

Answers
1. Some animals eat plants, some plant eating animals, while some eat both plants and plant eating animals. Thus , we can say all animalos depend on plants for their food.
2. Omnivores get meat, eggs, fish and milk from animals as their food.
3. Cows and goats gives us milk. They should be fed on grass and oil-seed cake as these are milk producing food.
4. Earth worm eat soil which contain parts of dead plants animals.
5. Domestic animals serves us well if we take good care of them.

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