NCERT Solutions for Class 6 Science Chapter 8 Body Movements
NCERT solutions for class 6 science chapter 8 body movements exercise:
Q1. 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.
Answer: a. movement,
b. skeleton,
c. hinge,
d. muscles.
Q2: Indicate true (T) and false (F) among the following sentences.
(a) The movement and locomotion of all animals is exactly the same. ( )
(b) The cartilages are harder than bones. ( )
(c) The finger bones do not have joints. ( )
(d) The forearm has two bones. ( )
(e) Cockroaches have an outer skeleton. ( )
Answer: (a) False
(b) False
(c) False
(d) True
(e) True
Q3 . Match the items in Column I with one or more items of Column II.
|
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: The matched column is :
|
Column I |
column II |
|
Upper jaw |
is an immovable joint |
|
Fish |
have a streamlined body, have fins on the body |
|
Ribs |
protect the heart |
|
Snail |
Show very slow movement |
|
Cockroach |
Can fly in the air, has an outer skeleton |
Q4 (a): Answer the following:
(a) What is a ball and socket joint?
Answer: A ball and socket joint is a type of synovial joint, such as the hip and shoulder joints. In this type of joint, one bone has a smooth, ball-shaped head that fits into a cuplike socket on the other end. In the hip, the head of the femur has a hemispherical shape that fits in the cuplike socket of the acetabulum of the pelvis. This type of joint is one of the most moveable joints in the body.
Q4 (b): Answer the following:
(b) Which of the skull bones are movable?
Answer: Mandible bone which forms the lower jaw is the only skull bone that is movable
Q4 (c): Answer the following:
(c) Why can our elbow not move backwards?
Answer: Our elbow cannot move back because the elbow has a hinge joint that allows movement in only one direction.
Study Resources Quick Links
Study Notes
Reference Books Solutions
- HC Verma Part 1
- HC Verma Part 2
- RD Sharma Class 9
- RD Sharma Class 10
- RS Aggarwal Class 10
- Lakhmir Singh Class 9
- Lakhmir Singh Class 10
