Chapter 8 Body Movements

Question 1. Which of the following parts of our body help us in movement?

(i) Bones

(ii) Skin

(iii) Muscles

(iv) Organs

Choose the correct answer from the option below.

(a) (i) and (iii)

(b) (ii) and (iv)

(c) (i) and (iv)

(d) (iii) and (ii)

Question 2. Which of the following joints is immovable?

(a) Shoulder and arm

(b) Knee and joint

(c) Upper jaw and skull

(d) Lower jaw and upper jaw

Question 3. Which of the following organisms does not have both muscles and skeleton for movement?

(a) dog

(b) snail

(c) earthworm

(d) human being

Question 4. Underwater divers wear fin-like flippers on their feet to

(a) swim easily in water.

(b) look like a fish.

(c) walk on water surface.

(d) walk over the bottom of the sea (sea bed).

Question 5. Snail moves with the help of its

(a) shell

(b) bone

(c) muscular foot

(d) whole body

Question 6. How many muscles work together to move a bone?

(a) One

(b) Two

(c) Three

(d) Four

Question 7. Name the type of joint of your hand which help you to grasp a badminton racquet.

Question 8. What would have happened if our backbone was made of one single bone?

Question 9. Provide one word answers to the statements given below.

1. Joint which allows movement in all directions.

2. Hard structure that forms the skeleton.

3. Part of the body with a fixed joint.

4. Help in the movement of body by contraction and relaxation.

5. Bones that join with chest bone at one end and to the backbone at the other end.

6. Framework of bones which gives shape to our body.

7. Bones which enclose the organs of our body that lie below the abdomen.

8. Joint where our neck joins the head.

9. Part of the skeleton that forms the earlobe.

Question 10. Write the type of joint which is used for each of the following movements:

(a) A cricket bowler bowls the ball.

(b) A girl moves her head in right and left direction.

(c) A person lifts weights to build up his biceps.

Question 11. Match the name of the animals given in Column I with its body parts used for movement given in Column II.

Question 12. Given below is a list of different types of movements in animals. Write the types of movements seen in each animal.

(a) Duck

(b) Horse

(c) Kangaroo

(d) Snail

(e) Snake

(f) Fish

(g) Human beings

(h) Cockroach

Question 13. Boojho fell off a tree and hurt his ankle. On examination the doctor confirmed that the ankle was fractured. How was it detected?

Question 14. Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?

Question 15. Which type of movement would have been possible if

(a) our elbow had a fixed joint.

(b) we were to have a ball and socket joint between our neck and head.

Question 16. Earthworms are known as ‘farmer’s friends’. Why?

Question 17. (a) Unscramble the jumbled words and write them in the blank spaces provided.

(i) neosb ................

(ii) tnemevom ................

(iii) iontcaronct ................

(iv) lsecsum ................

(v) arctigeal ................

(vi) epahs ................

(vii) sangro inerlan ................

(viii) laxaeriont ................

(b) Read the following paragraph and fill in the blanks using the words you unscrambled.

______(a)______ and ______(b)______ form the skeleton of the human body. They provide the framework, give ______(c)______ to the body and help in ______(d)______ They protect the ______(e)______ The bones are moved by alternate ______(f)______ and ______(g)______ of two sets of ______(h)______ attached to them.

Question 18. How is the skeleton of a bird well-suited for flying?

Question 19. In Fig. 8.2 there are two snakes of the same size slithering on sand. Can you identify which of them would move faster and why?