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NCERT Solutions for Class 6 Science Chapter 8: Body Movements

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In the NCERT Solutions Class 6 Science, there are 15 chapters all of them are very important. Swiflearn offers the most correct NCERT Solutions for Class 6 Science Chapter 8 Body Movements will make you understand its concepts & will help you in higher studies.

 

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NCERT Solutions for Class 6 Science Chapter 8 Body Movements

NCERT 6th Science Chapter 8 1

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.

 

Solution:
(a) Joints of the bones help in the movement of the body.
(b) A combination of bones and cartilages forms the skeleton of the body.
(c) The bones at the elbow are joined by a hinge joint.
(d) The contraction of the muscles pulls the bones during movement.

 

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

 

Solution:
(a) The movement and locomotion of all animals is exactly the same. (F)
(b) The cartilages are harder than bones. (F)
(c) The finger bones do not have joints. (F)
(d) The fore arm has two bones. (T)
(e) Cockroaches have an outer skeleton. (T)

 

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
                             Shows very slow movements
                               Have a streamlined body

 

Solution:
Column I                   Column II

Upper jaw                  Is an immovable joint
Fish                            Have fins on the body
Have a streamlined body
Ribs                             Protect the heart
Snail                            Has an outer skeleton
Shows very slow movements
Cockroach                 Can fly in the air
Has an outer skeleton

 

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

 

Solution:
(a) In a ball and socket joint, one end of a bone with round head fits into hollow space of another bone. This makes the bone free to rotate. For example, bones of hip and shoulder can move in all directions due to ball and socket joints.
(b) The only movable bone of the skull is the lower jaw.
(c) Our elbow has hinge joint. Hinge joint allows the movement only in one plane. This is the reason why we cannot move the elbow backwards.

 

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