Extra 30 short questions and answers from the chapter:8 "Body Movements" for Class 6 Science (CBSE):

 

What is a skeleton?

The skeleton is the framework of bones that gives shape and support to the body. It also helps in movement and protects internal organs.

What are joints? Name different types of joints.

Joints are the places where two or more bones meet and allow movement. The types of joints are:

Ball and socket joint

Hinge joint

Pivot joint

Fixed joint

Gliding joint

What is the function of the rib cage?

The rib cage protects vital organs like the heart and lungs. It also supports breathing movements.

What are hinge joints? Give two examples.

Hinge joints allow movement in only one direction, like the opening and closing of a door.

Example: Elbow joint, Knee joint

What is the function of the backbone (vertebral column)?

The backbone provides support to the body and protects the spinal cord. It also helps in bending and twisting movements.

What is a ball and socket joint? Give an example.

A ball and socket joint

allows

movement in all directions.

Example: Shoulder joint, Hip joint

What are ligaments?

Ligaments are strong, flexible tissues that connect bones to other bones at joints. They help in movement and stability.

What are tendons?

Tendons are tough, fibrous tissues that connect muscles to bones and help in movement.

What is a pivot joint? Where is it found?

A pivot joint allows rotational movement around a fixed point.

Example: Joint between the skull and the first vertebra (neck joint).

What is the function of the skull?

The skull protects the brain and gives shape to the face. It consists of fixed joints that do not allow movement.

What are the main functions of bones?

Bones provide shape and support to the body, protect internal organs, and help in movement.

What is cartilage? Where is it found?

Cartilage is a soft, flexible tissue that reduces friction between bones at joints.

Found in: Nose, ear, between bones, and at the ends of bones.

What is the importance of muscles in movement?

Muscles work in pairs to move bones. When one muscle contracts, the other relaxes, enabling movement.

How do fish move in water?

Fish move by using their fins and tail. They push water backward with their tail, which moves their body forward.

How does a snake move?

A snake moves in a wave-like motion called slithering. It uses its muscles and scales to push against the ground.

How do birds fly?

Birds have hollow bones and strong chest muscles. They use their wings to push air downward, which lifts them into the air.

How do earthworms move?

Earthworms move by contracting and expanding their body segments. Tiny bristles on their body help them grip the ground.

How does a cockroach move?

Cockroaches move using three pairs of legs. They also have wings that help them fly short distances.

Why can’t we move our elbow backward?

The elbow has a hinge joint, which allows movement only in one direction (forward and backward, but not in all directions).

Why do we need a skeleton?

The skeleton provides shape, support, movement, and protection to the body. It also helps in the production of blood cells.

Why do bones need joints?

Joints connect bones and allow movement. Without joints, bones would be rigid, and movement would not be possible.

What is the difference between bones and muscles?

Bones: Hard structures that form the skeleton and provide support.

Muscles: Soft tissues that help in movement by contracting and relaxing.

What type of movement is possible in the neck? Why?

The neck can rotate side to side due to the presence of a pivot joint.

How does a snail move?

A snail moves using a muscular foot, which produces mucus to reduce friction and help it glide over surfaces.

Why is the backbone made of many small bones instead of one long bone?

The backbone is made of small vertebrae to provide flexibility, allowing bending and twisting movements.

What is the role of muscles in movement?

Muscles contract and relax in pairs to move bones and body parts.

Which type of joint allows movement in all directions?

Ball and socket joint (Example: Shoulder and hip joint).

What are the two types of skeletons found in animals?

Endoskeleton:

Internal skeleton (Example: Humans, fish).

Exoskeleton:

External skeleton (Example: Cockroach, snail).

Why do animals need movement?

Animals need movement for various reasons such as searching for food, escaping predators, and finding shelter.

What are the main functions of the human skeleton?

Provides shape and support

Protects internal organs

Helps in movement

Produces blood cells