Chapter 8: Body Movements

Science

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  Chapter 8: Body Movements

  Class-VI

  Exemplar Solutions

Multiple Choice Questions

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)

Answer

(a)

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

Answer

(c)

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

Answer

(c)

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).

Answer

(a)

Question 5

 

Snail moves with the help of its

 

(a) shell

(b) bone

(c) muscular foot

(d) whole body

Answer

(c)

Question 6

 

How many muscles work together to move a bone?

 

(a) One

(b) Two

(c) Three

(d) Four

Answer

(b)

Very Short Answer Questions

 

Question 7

 

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

 

Answer

Hinge Joints

Question 8

 

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

Answer

If it would have been so then we would have not been able to bend down from our waist.

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.

Answer

1. Ball and Socket
2. Bone/s
3. Upper Jaw with Skull
4. Muscles
5. Rib
6. Skeleton
7. Pelvic Bones
8. Pivotal
9. Cartilage

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.

Answer

(a): Ball and Socket Joint

(b): Pivotal Joint

(c): Hinge Joint

 

Short Answer Questions

 

Question 11

 

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

Answer

(a) - (iii)

(b) – (v)

(c) – (iv)

(d) – (ii)

(e) – (i)

Question 12

Given below is a list of different types of movements in animals.

Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping

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

Answer

• Duck : Flying, Walking, Swimming
• Horse : Running, Walking
• Kangaroo : Jumping, Walking
• Snail : Creeping
• Snake : Slithering
• Fish : Swimming
• Human Beings : Walking
• Cockroach : Walking, Flying

 

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?   

 

Answer

 

The Doctor must have observed a swelling in the ankle and would have taken a X-Ray of the ankle. X-Ray images confirms injuries/fractures in bones.

 

 

Question 14

 

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

 

Answer

 

Elbow and knee are not made up of a single bone, but of two or more bones which are joined to each other by a joint (Hinge joint). This joint along with the muscles help us to bend the elbow and knee.

 

 

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.

 

Answer

 

(a) : We would have not been able to fold/bend our arms.

(b) : We would have been able to rotate our head 360⁰.

 

 

Question 16

 

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

 

Answer

 

An earthworm eats its way through the soil. Its body excretes the undigested materials that makes the soil fertile.

 

 

 

Long Answer Questions

 

 

Question 17

 

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

(i) neosb    (v)  arctigeal

(ii) tnemevom  (vi)  epahs

(iii) iontcaronct  (vii)  sangro inerlan

(iv) lsecsum  (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.

 

Answer

 

(a): (i)  bones

  (ii)  movement

  (iii)  Contraction

  (iv)  muscles

   (v)  cartilage

   (vi)  shape

   (vii)  internal organs

   (viii)  relaxation

(b): (a): bones

  (b): cartilage

  (c): shape

  (d): movement

  (e): internal organs

  (f): contraction

  (g): relaxation

  (h): muscles

 

 

Question 18

 

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

 

Answer

 

The reason behind it is listed as below:

1. Bones are hollow and light.
2. Bones of hind limbs are for walking and perching.
3. Bones of fore limbs are modified as wings.
4. Shoulder bones are strong.
5. Breast bones hold flight muscles and are used to move the wings up and down.

 

 

Question 19

 

In the following figure there are two snakes of the same size slithering on sand. Can

you identify which of them would move faster and why?

 

 

 

 

 

Answer

 

A snake forms loops in its body while slithering. Each loop of the snake gives it a forward push by pressing against the ground. The snake with a large number of loops moves much faster than the snake with less number of loops. Thus snake "A" will move faster than snake "B".