Olympiad Test: Body Movements - Class 6 MCQ

Hinge joint allows back and forth movement only. Bones in the knee, elbow, finger, and toes have hinge joint.

Topic in NCERT: Hinge joints

Line in NCERT: "The elbow has a hinge joint that allows only a back and forth movement."

The skeletal system is the framework of bones that support our body and keeps it upright.

Topic in NCERT: Fixed Joints

Line in NCERT: "Bones and cartilage form the skeleton of the human body. It gives the frame and shape to the body and helps in movement."

The bones in elbow have hinge joint that allows only back and forth movement.

Topic in NCERT: Hinge joints

Line in NCERT: "The elbow has a hinge joint that allows only a back and forth movement."

- Earthworm: Earthworms move by contracting and expanding their body segments. They have circular and longitudinal muscles.
The correct answer is C: Earthworm.

Topic in NCERT: GAIT OF ANIMALS

Line in NCERT: "Earthworms move by alternate extension and contraction of the body using muscles."

Cockroach can walk, climb and can also fly in air. The muscles in the breast region move the legs for walking while another set of breast muscles move the wings during flying.

Topic in NCERT: Cockroach

Line in NCERT: "Cockroaches walk and climb as well as fly in the air."

Ball and socket joint allows movement in many directions. The shoulder joint and hip joint are examples of ball and socket joint.

Topic in NCERT: Ball and socket joints

Line in NCERT: "Such a joint allows movements in all directions."

• Some Birds like Ducks, Swans also swim in water. Birds like ducks and swans have flippers that help them to swim .

Topic in NCERT: Birds

Line in NCERT: "Some birds like ducks and swans also swim in water."

• Among the listed organisms, only the snake has a backbone.
• Snakes are classified as vertebrates, which means they have a spinal column made of vertebrae.
• Spiders and snails are invertebrates, lacking a backbone.
• Starfish, while having a hard structure, do not possess a backbone either.
• Understanding these classifications helps us learn about the diversity of life forms on Earth.

Topic in NCERT: How do snakes move?

Line in NCERT: "Snakes have a long backbone."

The snail moves using a muscular foot. This foot contracts and expands, producing a wave-like motion that helps it glide over surfaces.

Topic in NCERT: Snail
Line in NCERT: "The thick structure is its foot, made of strong muscles"

The shoulder has a ball and socket joint that allows movement in all directions, enabling the rotation of the arm.

Topic in NCERT: Ball and socket joints

Line in NCERT: "The bowl is like the part of the shoulder to which your arm is joined."

Fins help the fish to move in water. The forward movement of the fish starts with front and sideways push of the tail. The flexible and strong tail fin of the fish pushes the water and propels the fish forward.

Topic in NCERT: Fish Movement

Line in NCERT: "The fish forms a curve as shown in Fig. 5.24. Then, quickly, the body and tail curve to the other side. This makes a jerk and pushes the body forward. A series of such jerks make the fish swim ahead. This is helped by the fins of the tail."

Earthworms move using tiny bristles called setae, which grip the ground during movement.

Topic in NCERT: Gait of animals
Line in NCERT: "Under its body, it has a large number of tiny bristles (hair like structures) projecting out. The bristles are connected with muscles. The bristles help to get a good grip on the ground."

The skull forms a bony structure that protects the brain from injury.

Topic in NCERT: Fixed joints

Line in NCERT: "The skull is made up of many bones Joined together (Fig. 5.14). It encloses and protects a very important part of the body, the brain."

Our shoulder has the ball and socket joint that allows circular movement. When you bowl while playing cricket, you rotate your hand in full circle.

Topic in NCERT: Ball and socket joints

Line in NCERT: "Such a joint allows movements in all directions."

• The skeletal system provides a framework for the body, supporting and protecting vital organs.
• Muscles are attached to bones via tendons, allowing for movement when muscles contract.
• This attachment enables the transfer of force from muscles to bones, facilitating motion such as walking, running, and lifting.
• Without these attachment points, muscles could not effectively move the body or maintain posture.

Topic in NCERT: Skeleton

Line in NCERT: "Bones and cartilage form the skeleton of the human body. It gives the frame and shape to the body and helps in movement."