Class 6 Science Chapter 5 Question Answers - Body Movements

Short Answer Questions

Q1: What is the main reason animals move from one place to another?
Ans: Animals move to find food and water, escape from enemies, return to shelters, and migrate to avoid harsh seasons.

Q2: What is the function of the human skeleton?
Ans: The human skeleton supports the body, facilitates movement, protects vital organs, and produces red blood cells in the bone marrow.

Q3: What holds the bones of the human skull together, and why are these joints called immovable joints?
Ans: The bones of the human skull are held together by sutures. These joints are called immovable because they do not allow movement.

Q4: How do fish swim, and what propels them forward in the water?
Ans: Fish swim by bending their body and tail in quick succession. Muscle expansion and relaxation create a zigzag motion that propels them forward.

Q5: What are the main adaptations of birds for flying?
Ans: Birds have lightweight, porous, and hollow bones. Their wings are covered with feathers, and the streamlined body shape aids in flying.

Long Answer Questions

Q1: Explain the differences between vertebrates and invertebrates. Provide examples of each.
Ans: Vertebrates have a backbone or vertebral column, while invertebrates do not. Examples of vertebrates include fish, amphibians, birds, and mammals. Invertebrates include earthworms, snails, insects, spiders, crabs, corals, and starfish.

Q2: Describe the functions and components of the human skeleton.
Ans: The human skeleton supports the body, facilitates movement, protects vital organs, and produces red blood cells in the bone marrow. It consists of 206 bones, cartilages, and ligament tissues.

Q3: Explain how movable joints in the human body work and provide examples of different types of movable joints.
Ans: Movable joints are surrounded by synovial fluid, cartilage, and ligaments. These joints allow various movements. Examples of movable joints include the ball-and-socket joint (found in the hip and shoulder), hinge joint (elbow and knee), pivot joint (neck), and gliding joint (wrists and ankles).

Q4: Discuss how animals like earthworms, snails, and snakes move without limbs.
Ans: Earthworms move using muscles and bristles that grip the ground. Snails drag their shells with a sticky foot and slimy mucus. Snakes move by sliding their bodies, aided by scales pressing to the ground.

Q5: Explain the adaptations that birds and bats have for flying.
Ans: Birds have lightweight, porous, and hollow bones. Their wings are covered with feathers, and the streamlined body shape aids in flying. Bats have elongated wing bones and flaps of skin, using hair instead of feathers.