NCERT Solutions for Class 6 Science
Chapter 8 Body Movements
LearnFatafat offers free NCERT Solutions for Class 6 Science Chapter 8 Body Movements. Chapter covers the topics like joints in human body, human skeletal system, human muscular system, the skin structure and its function, gait of snake, earthworm, snail, fish, cockroach, birds and more. Check video lessons for Class 6 Science Chapter 8 Body Movements click here to buy.
NCERT Solutions for Class 6 Science Chapter 8 Body Movements
1. Fill in the blanks:
(a) Joints of the bones help in the _____________ of the body.
Answer: movement
(b) A combination of bones and cartilages forms the _______ of the body.
Answer: skeleton
(c) The bones at the elbow are joined by a ______________________ joint.
Answer: hinge
(d) The contraction of the _____________ pulls the bones during movement.
Answer: muscle
2. Indicate true (T) and false (F) among the following sentences.
(a) The movement and locomotion of all animals is exactly the same.
Answer: False.[ The movements and locomotion of all animals are not same. ]
(b) The cartilages are harder than bones.
Answer: False.[ Bones are harder than cartilages. ]
(c) The finger bones do not have joints.
Answer: False.[ The finger bones have a joints. This why we can bend them ].
(d) The fore arm has two bones.
Answer: True.
(e) Cockroaches have an outer skeleton.
Answer: True.
3. Match the items in Column I with one or more items of Column II.
| Column I | Column II |
|---|---|
| Upper Jaw | Have fins on the body |
| Fish | Has an outer skeleton |
| Ribs | Can fly in the air |
| Snail | Is an immovable joint |
| Cockroach | Protect the heart |
| Show very slow movement | |
| Have a streamlined body |
Answer:
| Column I | Column II |
|---|---|
| Upper Jaw | Is an immovable joint |
| Fish | Have a streamlined body, have fins on the body. |
| Ribs | Protect the heart |
| Snail | Show very slow movement |
| Cockroach | Can fly in the air, has an outer skeleton |
4. Answer the following:
(a) What is a ball and socket joint?
Answer: The rounded end of one bone fits into the cavity (hollow space) of the other bone is called ball and socket joint. Such a joint allows movements in all directions.
(b) Which of the skull bones are movable?
Answer: Lower jaw is the only movable bone of skull bone.
(c) Why can our elbow not move backwards?
Answer: Our elbow have hinge joint. Hinge prevents movement of elbow backward.
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Chapter 8 – Body Movements
