Body Movements Exercise Question Answer

NCERT class 6 Science Chapter 8 Body Movements Exercise Question Answer

1. Fill in the blanks:
(a) Joints of the bones help in the ________ of the body.
(b) A combination of bones and cartilages forms the _______ of the body.
(c) The bones at the elbow are joined by a ______________________ joint.
(d) The contraction of the _____________ pulls the bones during movement.

Answer: a) Movement, b) Skeleton, c) Hinge, d) Muscles.

2. Indicate true (T) and false (F) among the following sentences.
(a) The movement and locomotion of all animals are exactly the same. ( )
(b) The cartilages are harder than bones. ( )
(c) The finger bones do not have joints. ( )
(d) The forearm has two bones. ( )
(e) Cockroaches have an outer skeleton. ( )

Answer:

(a) F,

(b) F,

(c) F,

(d) T,

(e) T.

3. Match the items in Column I with one or more items of Column II.

Answer:

Upper jaw is an immovable joint.

Fish: have a streamlined body, have fins on the body.

Ribs: protect the heart.

Snail: shows very slow movement.

Cockroach: has an outer skeleton.

4. Answer the following:
(a) What are a ball and socket joint?
(b) Which of the skull bones is movable?
(c) Why can our elbow not move backward?

Answer:

Working of a ball and socket joint

a) In this joint one bone has a round end while the other bone ends in a socket. Here bone with round end moves freely inside the socket. We call them a ball and socket joint.

b) Lower jaw.

c) Hinge joint allows the bones to move only in one direction.

Read Also:

Quick revision notes on Body Movements.

Activity solution from Body movements.

Reference: NCERT class 6 Science Chapter 8

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