CBSE Class 6 Science Body Movements Notes

CBSE Class 6 Science - Body Movements. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations. 

NOTES  Class-6th  Term-1 

Body Movements

 Q2 Define Joints. Name the various types of movable joints

Ans. A joint is a place where two or more bones meet. Various types of movable joints are-

1 ball and socket joint

2.Pivotal joint

3 .Hinge joint

Q3 Bones are hard and cannot be bent? How do we bend our limbs at the elbow and knees?

Ans. We can bend our limbs at the elbow and knees because of presence of hinge joint .

Q4 What are fixed joints ? Give its example.

Ans. Fixed joints do not allow any movement. eg. bones of our skull.

Q5 What is a ball and socket joint? Give its example.

Ans. In this type of joint ball of one bone is fitted in the socket of another bone .eg hip joint

Q6 How are we able to move our head up and down and sideways?

Ans. Pivotal joint

Q7 Name the joint that allows movement in one plane only?

Ans. Hinge joint

Q8 Define pivotal joint.

A In this joint rounded surface of one bone fits into the ring formed by the other.

Q9 What is the significance of human skeleton? (2 points)

Ans. 1 It provides support to the body and give specific shape to it

2 It helps to protect delicate organs.

Q10 What is a rib cage?

Ans. Chest bone and backbone together form a box called ribcage

Q11 What are the important organs protected by ribcage?

Ans. Heart and lungs

Q12 How many bones are present in our shoulder?

Ans. Two

Q13 Differentiate between bone and cartilage?

Ans. Bone is hard and inflexible and cartilage is soft and flexible

Q14 What is the main function of a muscle and how does it work?

Ans. Muscles help in movement by contraction and relaxation. Muscles move bones by contracting and thus pulling them but they cannot push back. That is why muscles work in pairs. One muscle pulls the bone away from the joint and another pulls it back.

Q15 Why do we say that earthworm are friends of farmers?

Ans. Earthworm decomposes organic waste and makes the soil more airy.

Q16 How does earthworm fix its body parts to the ground?

Ans. Bristles help to get a good grip on the surface of the ground.

Q17 What area the special features that help a bird to fly?

Ans. Birds have following featuresa)

a) Wings to fly.

b) streamlined body which reduces air resistance.

C) hollow bones which make them light in weight

Q18 What are the different body parts used by cockroach for its movements?

Ans. It has 3 pair of legs and 2 pairs of wings which helps it to fly and climb.

Q19 What is the significance of streamlined body in fishes?

Ans. This reduces water resistance and make it easy for fish to swim.

Q20 What is the importance of fins in fish?

Ans. It helps them to swim.

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