Which of the following parts of our body help us in movement?
(i) Bones
(ii) Skin
(iii) Muscles
(iv) Organs
Choose the correct answer from the option below.

1

(a)

(i) and (iii)

(b)

(ii) and (iv)

(c)

(i) and (iv)

(d)

(ii) and (iii)

How many muscles work together to move a bone?

1

(a)

One

(b)

Two

(c)

Three

(d)

Four

Snail moves with the help of its

1

(a)

shell

(b)

bone

(c)

muscular foot

(d)

whole body

Underwater divers wear fin-like flippers on their feet to

1

(a)

swim easily in water

(b)

look like a fish

(c)

walk on water surface

(d)

walk over the bottom of the sea (sea bed)

Which of the following organisms does not have both muscles and skeleton for movement?

1

(a)

Dog

(b)

Snail

(c)

Earthworm

(d)

Human being

The delicate internal organ which is not protected by the ribcage is

1

(a)

heart

(b)

brain

(c)

liver

(d)

lungs

The organs for locomotion in an earthworm are :

1

(a)

Segments

(b)

Slime

(c)

Muscles

(d)

Setae

The bones at joints are held together by:

1

(a)

Cartilage

(b)

Ligaments

(c)

Muscles

(d)

Tendons

The joint at the elbow is the _______joint.

1

(a)

Pivot

(b)

Hinge

(c)

Balland socket

(d)

Gliding

A cord of dense tissue that connects a muscle to a bone is a:

1

(a)

Ligament

(b)

Tendon

(c)

Cartilage

(d)

Fibre

Elbow joint is a ________ joint.

1

(a)

hinge

________ bone is the longest and the strongest bone in human body.

1

(a)

Femur

Hollow space in bone is called ________.

1

(a)

cavity

The place where two bones meet, is called _________.

1

(a)

joint

There are ________ types of joints in human skeleton.

1

(a)

five.

Why is our backbone not fixed?

1

(a)

Backbone is not fixed so that we can bend it.

What modifications do birds have for flying?

1

(a)

Forelimbs of birds are modified to wings which help them in flying.

Name the joint where our neck joins the head.

1

(a)

The joint where our neck joins the head is a pivotal joint.

What do you understand by the term "Gait of animals?

1

(a)

"Gait of animals" refers to the way of movement in animals. Different animals have different body parts that help them to move. Aristotle, an ancient Greek philosopher, wrote the book "Gait of Animals.

How does a streamlined body help in movement of animals that fly or swim in water?

1

(a)

A streamlined body is thicker in middle and tapers at both ends. This shape allows water to move easily around the body and offers least resistance to its flow.

Name the type of joints of your hand which helps you to grasp a badminton racquet.

2

(a)

If there is no joints, then will it be possible to move? Explain.

2

(a)

What would have happened if our backbone was made up of one single bone?

2

(a)

Name the organs that are protected by the rib cage.

2

(a)

Name three animals having streamlined body.

2

(a)

The hard and strong skull protects a delicate organ of our body. Name that organ

2

(a)

An earthworm does not have bones or legs, then how does it move?

2

(a)

The movements of some parts/organs of the body are not under control. Can you name two such parts/organs.

2

(a)

Why is the upper part of the human ear not soft as the lower part or the earlobe?

2

(a)

Why does an earthworm find it difficult to move on a glass?

2

(a)

Bhoojho fell off a tree and hurt his ankle. On examination, the doctor confirmed that the ankle was fractured. How was it detected?

3

(a)

Bones are hard structures and cannot be bent. But we can still bend our elbow, knee, etc. How is this possible?

3

(a)

Earthworms are known as farmer's friends. Why?

3

(a)

The body of the fish is similar to the boat. Explain, how does fish move in water.

3

(a)

There are 12 pairs of curved bones called X in our chest region. One end of bones X is joined to backbone and their other end is joined to bone Y in the front to form a box-like structure Z. This strong, box-like structure protects the delicate organs P, Q and R our body.
(a) What are (i) X, (ii) Y and (iii) Z?
(b) Name the organs.
(i) P (ii) Q (iii) R

3

(a)

Skeleton is made of bones but it has some cartilage too. Do you agree?

3

(a)

Which type of movement would have been possible if
(a) our elbow had a fixed joint.
(b) we were to have a ball and socket joints between our neck and head.

3

(a)

State the consequence if the backbone had only one long bone instead of many vertebrae.

3

(a)

We are able to move a few parts of our body easily in various directions and some only in one direction. Why it is so?

3

(a)

Why is It that we are able to move a few parts of our body easily in various directions and some only in one direction?

3

(a)

In the figure given below, there are two snakes of the same size slithering on sand. Can you identify which of them would move faster and why?

5

(a)

How is the skeleton of a bird well-suited for flying?

5

(a)

Rishi was playing football with his friends. While playing football he fell down and started crying. On seeing him crying, his friends rushed to him and found that he was unable to move his right leg. His friends took him to his house. His father immediately rushed him to a doctor. Doctor diagnosed that his leg was fractured.
(a) Can you suggest, how did doctor diagnose in Rishi's leg?
(b) What do X-rays show us?
(c) What are the values shown by Rishi's friends?

5

(a)

Describe the skeleton of a cockroach.

5

(a)