NCERT Class VI Science Solutions: Chapter 8-Body Movements Part 2

Doorsteptutor material for CBSE is prepared by world's top subject experts: fully solved questions with step-by-step explanation- practice your way to success.

Loading video

NCERT Class 6 Science Chapter 8: Body Movements

Question 2:

Indicate true (T) and false (F) among the following sentences.

  1. The movement and locomotion of all animals is exactly the same. ( )

  2. The cartilages are harder than bones. ( )

  3. The finger bones do not have joints. ( )

  4. The fore arm has two bones. ( )

  5. Cockroaches have an outer skeleton. ( )

Answer:

  1. The movement and locomotion of all animals is exactly the same. (False)

  2. The cartilages are harder than bones. (False)

  3. The finger bones do not have joints. (False)

  4. The fore arm has two bones. (True)

  5. Cockroaches have an outer skeleton. (True)

Question 3:

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

Match the items in Column I with one or more items of Column II (Q)

Column I

Column II

Upper jaw

have fins on the body

Fish

has an outer skeleton

Ribs

can fly in the air

Snail

is an immovable joint

Cockroach

protect the heart

shows very slow movement

have a streamlined body

Answer:

Match the items in Column I with one or more items of Column II (A)

Column I

Column II

Upper jaw

is an immovable joint

Fish

have fins on the body, have a streamlined body

Ribs

protect the heart

Snail

shows very slow movement

Cockroach

has an outer skeleton, can fly in the air

Question 4:

Answer the following:

  1. What is a ball and socket joint?

  2. Which of the skull bones are movable?

  3. Why can our elbow not move backwards?

Answer:

  1. A ball and socket joint is a moveable joint. It has a rounded end of one bone fit into the cavity (hollow space) of the other bone. It allows movement in all directions. Example: shoulder joints.

As showing in images is a shoulder anatomy

Shoulder Anatomy

Loading image
  1. Only the lower jaw in skull bones is movable.

As showing in images is a Result for the Bones of skull

Bones of the Skull

Loading image
  1. Elbow joint is an example of hinge joint which allows only back and forth movements. Therefore, we cannot move our elbow backwards.

As showing in images is a elbow backwards.

Elbow Hurts when Bending You Arm

Loading image