NCERT Class VI Science Solutions: Chapter 8-Body Movements Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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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 IColumn II
Upper jawhave fins on the body
Fishhas an outer skeleton
Ribscan fly in the air
Snailis an immovable joint
Cockroachprotect 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 IColumn II
Upper jawis an immovable joint
Fishhave fins on the body, have a streamlined body
Ribsprotect the heart
Snailshows very slow movement
Cockroachhas 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
  1. Only the lower jaw in skull bones is movable.
As Showing in Images is a Result for the Bones of Skull
  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

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