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BAL BHARATI PUBLIC SCHOOL, PITAMPURA, DELHI-110034
NOTES CLASS-6 2013-2014 TERM-1
BODY MOVEMENTS
Q1 Complete the following table
Name of the animal
Body parts
How they move
Cockroach
Limbs, wings
Walk, fly
Frog
Crow
Earthworm
Limbs
Wings, limbs
muscles
Hop
Fly
creep
Q2 Define Joints. Name the various types of movable joints
A A joint is a place where two or more bones meet. Various types of movable joints are1 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?
A We can bend our limbs at the elbow and knees because of presence of hinge joint .
Q4 What are fixed joints ? Give its example.
A Fixed joints do not allow any movement. eg. bones of our skull.
Q5 What is a ball and socket joint? Give its example.
A 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?
A Pivotal joint
Q7 Name the joint that allows movement in one plane only?
A 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)
A 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?
A Chest bone and backbone together form a box called ribcage
Q11What are the important organs protected by ribcage?
A Heart and lungs
Q12How many bones are present in our shoulder?
A Two
Q13 Differentiate between bone and cartilage?
A Bone is hard and inflexible and cartilage is soft and flexible
Q14What is the main function of a muscle and how does it work?
A 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?
A Earthworm decomposes organic waste and makes the soil more airy.
Q16 How does earthworm fix its body parts to the ground?
A Bristles help to get a good grip on the surface of the ground.
Q17What area the special features that help a bird to fly?
A Birds have following featuresa) 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?
A 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?
A This reduces water resistance and make it easy for fish to swim.
Q20What is the importance of fins in fish?
A It helps them to swim.