Les 1 Life Cycle of Animals

I . Write whether True or False:

1. A female butterfly lays eggs on the leaves of a plant.- True

2. A lamb emerges from an egg. - False

3. An adult butterfly emerges from the chrysalis- True

4. As butterflies grow, they pass through five stages. -False

II Name the following:

1. This is the larva of a butterfly – caterpillar

2.  An animal that lays eggs – hen

3. Life cycle of a butterfly – egg, caterpillar (larva), chrysalis (pupa) and adult butterfly

III. Answer the following :

1. Why cannot we see the eggs of an ant?

Ans We cannot see the eggs of an ant because they are very tiny.

2. What is necessary for the chicks to grow inside the eggs?

Ans:  Warmth is necessary for the chicks to grow inside the eggs.

Les 2  Inter – relationship between Living Things

I.                            Fill in the blanks.

1. After rainy season, winter comes again.

2. We keep animals because animals meet some of our needs.

 3. We spray pesticides to prevent insects from attacking plants.

4. Winter is also known as a season of Paangal.

5. The three seasons are summer, winter and the rainy season.

II.       Answer the following questions.

1. How are plants useful to us?

Ans:  Plants give us food grains, medicines, vegetables and fruits. We get flowers from plants. Plants give us oxygen too.

2.    What is meant by arboreal animals?

Ans: Arboreal animals are those animals that live in the trees and feed on the fruits and insects 

            Eg. monkeys and squirrels.

 3.    What changes do we see in trees at the beginning of March ?  

Ans. In the beginning of March there is a change in the season from winter to summer. Therefore many trees are seen with new leaves.

 4.   What are the needs of all living things?

Ans        Food ,water and air are the three basic needs of all living things.

 5.   Name two things that we get from animals?

Ans :  We get milk and eggs from animals.

III. Give Reasons:

1. Monkey and squirrels are arboreal.

Ans. Monkeys and squirrels can defend themselves from their enemies as they live on the trees. They get fruits and nuts to satisfy their hunger. Therefore, they spend their lives on trees and thus are arboreal.

2. We keep different domestic animals with us.

Ans. Some domestic animals satisfy our needs. Milk, meat, eggs are a few things obtains from animals. Some animals help in heavy farm work.  Due to all such benefits, we keep different domestic animals with us. 

Les 13 & 14  Direction and Maps , Symbols

I. State whether the following statements are True or False:

1. It is essential to give scale on a map- True

2. Caves are man- made. – True

3. Railway lines are nature- made. – False

4. The directions in which the sun sets is called east. – True

5. There are five sub-directions. - False

II. Answer the following in one sentence each:

1. Where do materials for man-made objects come from?

Ans. Materials for man-made objects come from nature.

2. What do we use to show elements of the environment on a map?

Ans. We use symbols to show elements of the environment on a map.

3. What do we use to find out the location or position of a  place?

Ans.  We use directions and sub-directions to find out the location or position of a place.

4. Why is the scale given in a map?

Ans. The scale is given in a map to show the relationship between the distances on a map and on the ground.

III. Answer in brief:

1. Which elements of the environment are not shown on a map? Why?

Ans. Moving elements of the environment is not shown on a map. Moving elements are never seen at a particular place for a long period of time. Therefore they are not shown on a map.