NCERT PRACTICE QUESTIONS
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.
Ans. - (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 is exactly the same. (False)
(b) The cartilages are harder than bones. (False)
(c) The finger bones do not have joints. (False)
(d) The fore arm has two bones. (True)
(e) Cockroaches have an outer skeleton. (True)
3. Match the items in Column I with one or more items of Column II.
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?
Ans. -
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) Lower jaw
c) Our elbow cannot move backwards because it has hinge joints which only allow back to forth movements.
Junior Science Topic - Body Movements. Chapter notes, video lectures, power point presentation and NCERT exercise solution. (Class VI, CBSE syllabus, chapter 08)
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