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. ( )
3. Match the items in Column I with one or more items of Column II.
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?
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.
Reference: NCERT class 6 Science Chapter 8