Science In Everyday Life Solutions for Class 6 Science Chapter 9 Form And Movement In Animals are provided here with simple step-by-step explanations. These solutions for Form And Movement In Animals are extremely popular among class 6 students for Science Form And Movement In Animals Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Science In Everyday Life Book of class 6 Science Chapter 9 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Science In Everyday Life Solutions. All Science In Everyday Life Solutions for class 6 Science are prepared by experts and are 100% accurate.

Page No 117:

Question 1:

Write two examples for each of the following.

1. Vertebrates ..................... .....................
2. Invertebrates ..................... .....................
3. Ball-and-socket joints ..................... .....................
4. Hinge joints ..................... .....................
5. Gliding joints ..................... .....................

Answer:

1. Fish and frog
2. Snail and earthworm
3. Hip joint and shoulder joint
4. Elbow joint and knee joint
5. Wrist joint and ankle joint

Page No 117:

Question 2:

Write one word for the following.
1. Animals that do not have a backbone
2. Animals that have a backbone
3. Body parts into which an earthworm's body is divided
4. Parts of a snail's body that have eyes at the tips
5. An elastic substance that forms the skeleton of a fish

Answer:

1. Invertebrates
2. Vertebrates
3. Segments
4. Tentacles
5. Cartilage

Page No 117:

Question 1:

Birds can fly because they have
(a) a streamlined body
(b) hollow bones
(c) wings with feathers
(d) all of these

Answer:

(d) all of these
Streamlined body, hollow bones and wings with feathers help birds to fly.

Page No 117:

Question 2:

Which of these special structures helps a snake to crawl?
(a) Cerci
(b) Fins
(c) Scales
(d) Bellies

Answer:

(c) scales
Snakes crawl with the help of special structures called scales.

Page No 117:

Question 3:

Movement is brought about by the contraction and relaxation of
(a) bones
(b) muscles
(c) joints
(d) joint and muscles

Answer:

(b) muscles
Muscles contract and relax to bring about movement.

Page No 117:

Question 4:

Which of the following is not a movable joint?
(a) Knee joint
(b) Joints in the skull
(c) Ankle joint
(d) None of these

Answer:

(b) joints in the skull
Joints in the skull are fixed or immovable joints.

Page No 117:

Question 5:

Knee joint is an example of
(a) pivot joint
(b) ball-and-socket joint
(c) hinge joint
(d) gliding joint

Answer:

(c) hinge joint
Knee joint is an example of hinge joint.

Page No 117:

Question 1:

Match the following.

Column A Column B
Vertebrates Fixed joints
Earthworms Muscular foot
Snail Bristles
Cockroach Have a backbone
Skull bones Cerci

Answer:

Column A Column B
Vertebrates Have a backbone
Earthworms Bristles
Snail Muscular foot
Cockroach Cerci
Skull bones Fixed joints



Page No 118:

Question 1:

Why do animals need to move?

Answer:

Animals need to move for the following reasons:
1. In search of food
2. In search of shelter
3. To escape from predators

Page No 118:

Question 2:

Differentiate between vertebrates and invertebrates. Give two examples of each.

Answer:

Vertebrates Invertebrates
Animals with backbone are called vertebrates. Animals with no backbone are called invertebrates.
Example: Frog and fish. Example: Snail and earthworm.

Page No 118:

Question 3:

How does a shell help a snail?

Answer:

A shell protects a snail from sun's heat and from enemies.

Page No 118:

Question 4:

What helps a fish move up and down in water and how?

Answer:

Swim bladder helps a fish to move up and down in water by emptying the air inside it.

Page No 118:

Question 5:

How do snakes move?

Answer:

Snakes move by crawling on their bellies in a wave-like pattern with the help of scales. Their flexible backbones push the body forward by pressing against the ground.

Page No 118:

Question 6:

List out the functions of the human skeleton.

Answer:

The functions of the human skeleton are as follows:
1. It helps in the movement of various body parts.
2. It protects the soft internal organs.
3. Bones are filled with marrow that produces blood cells.

Page No 118:

Question 7:

Write a short note on cartilage.

Answer:

Cartilage is a tough elastic tissue that covers the ends of bones. Cartilage makes the bones soft and reduces friction during movement. It is also present in the joints between the nose and the upper parts of the ears.

Page No 118:

Question 8:

What are X-rays? Who discovered them?

Answer:

X-rays are those rays that are able to pass through the tissues but not through the bones. They were discovered by Wilhelm Conrad Roentgen in 1895.

Page No 118:

Question 1:

Describe how the structure of an earthworm helps it to move.

Answer:

The structure of an earthworm helps it to move in the following ways:
1. Its segments lengthen and shorten for its movement. It extends its front end and fixes its rear end, and then fixes its front end and pulls its rear end.
2. The slimy substance secreted by its body helps in its movement.
3. The bristles present in its segments help it to grip on the surface and pull its body forward.

Page No 118:

Question 2:

Explain how the snail moves.

Answer:

Snail crawls on the layer of mucus secreted by its muscular foot. The sticky mucus reduces the friction between the surface and its body, thus making the surface smoother and enabling it to crawl forward in a wave-like pattern.

Page No 118:

Question 3:

With the help of dotted diagrams, explain the movement in a cockroach.

Answer:

Cockroaches have three pairs of legs and move, very interestingly, with three legs at a time. Let's suppose the red and blue dots as their legs. At first, the three red legs move forward and the three blue legs remain on the ground; then the blue legs move forward and the red legs remain on the ground.

Page No 118:

Question 4:

Explain the different features that help birds to fly.

Answer:

The different features that help birds to fly are as follows:
1. The streamlined body helps them to move in the air.
2. The hollow bones make them feel lightweight.
3. The wings help them to fly.
4. The powerful chest muscles help them to flap their wings while flying.

Page No 118:

Question 5:

Describe the human skeleton with the help of a well-labelled diagram.

Answer:



The human skeleton is divided into following parts:
1. Skull: It protects the brain from injury; its movement allows us to talk and chew food.
2. Rib cage: It provides protection to heart and lungs.
3. Backbone: It surrounds and protects the spinal cord.
4. Limbs: The forelimbs (arms) help us to lift various objects and the hind limbs (legs) help us to walk (move).

Page No 118:

Question 6:

Describe the different kinds of joints and the places where each one is found in the body and how they help in movement.

Answer:

The different kinds of joints, their positions and their help in movement are as follows:
  1. Ball-and-socket joints: The ball-like cavity fits into a cup-like hollow cavity of other bone. They are found in the hip and the shoulder and allow movement in all directions.
  2. Pivot joints: The rounded surface of one bone fits into the ring formed by the other bone in such a way that one bone is able to rotate over the other. They are found in the joint of neck and head.
  3. Hinge joints: These joints are found in the knee and the elbow and allow back-and-forth movement.
  4. Gliding joints: These joints allow bones to glide over each other. These joints provide little movement in all directions and are found in the bones of the skull.

Page No 118:

Question 7:

Explain how bones move.

Answer:

Muscles bring about movement of bones through contraction and relaxation, where one end of a muscle is attached to a movable bone and other end of a muscle is attached to a fixed bone. Muscles contract to pull the movable bone. In this way bones move.



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