NCERT Class 6 Science Chapter 8 Body Movements

Chapter 8 Body Movements

Question 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) 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.

Question 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. ( )
Answer:

a) False
b) False
c) False
d) True
e) True

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


Question 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?
Answer:

a) The rounded end of one bone fits into the cavity (hollow space) of the other bone. Such a joint allows movements in all directions, which is called ball and socket joint.
b) The lower jaw in the skull are movable.
c) Our elbow cannot move backwards as it is a hinge joint which only allow back and forth movement.

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