Bones are hard structures and cannot be bent. But we can still bend our elbow, knee, etc. How is this possible?

2

(a)

Earthworms are known as farmer's friends. Why?

2

(a)

The body of the fish is similar to the boat. Explain, how does fish move in water.

2

(a)

Can you imagine how does an earthworm fix parts of its body to the ground?

2

(a)

Given below is a list of different types of movements in animals:
Running, jumping, walking, slithering, crawling, flying, swimming, creeping.
Write the types of movements seen in each animal.

Duck	Horse
Kangaroo	Snail
Snake	Fish
Human being	Cockroach

2

(a)

Skeleton is made of bones but it has some cartilage too. Do you agree?

2

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The skeleton of cockroach is called exoskeleton. Do you agree? Explain.

2

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Mention the number of bones present in human skeletal system. Give its functions.

2

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State the consequence if the backbone had only one long bone instead of many vertebrae.

2

(a)

Plants do not move from one place to another. Do they show any other kind of movements? Which type of movements are shown by plants?

2

(a)

We are able to move a few parts of our body easily in various directions and some only in one direction. Why it is so?

2

(a)

Write two ways by which we may know the shape of human skeleton.

2

(a)

Why is It that we are able to move a few parts of our body easily in various directions and some only in one direction?

2

(a)

How many bones does middle finger have?

2

(a)

How does earthworm fix parts of its body to the ground?

2

(a)