NCERT Solutions for Class 6 Science - Body Movements

Q1: Fill in the blanks:
(a) Joints of the bones help in the __________ of the body. 
Ans: Movement

(b) A combination of bones and cartilage forms the __________ of the body. 
Ans: Skeleton

(c) The bones at the elbow are joined by a __________ joint. 
Ans: Hinge joint

(d) The contraction of the __________ pulls the bones during movements. 
Ans: Muscles

Bicep Muscles

Q2: Indicate true (T) and false (F) among the following sentences.
(a) The movement and locomotion of all animals is exactly the same. 
Ans: False

(b) The cartilage are harder than bones. 
Ans: False

(c) The finger bones do not have joints. 
Ans: False

(d) The forearm has two bones.
Ans: True

(e) Cockroaches have an outer skeleton. 
Ans: True

Q3: Match the items in Column I with one or more items of Column II.

Ans:

Q4: Answer the following:
(a) What is a ball and socket joint?
Ans: 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 a ball and socket joint.

(b) Which of the skull bones are movable? 
Ans: The lower jaw bone or mandible is the only movable bone in the skull.  

Lower Jaw(c) Why can our elbow not move backward? 
Ans: Elbow joint is composed of the hinge joint. These joints allow movement in one plane and up to 180° only. Hence, we cannot move our elbows backward.