Science 8 · Unit 1: Respiration · Cambridge Lower Secondary Science Stage 8

Questions

1. 1. What is another name for the trachea?

   • the food pipe
   • the voice box
   • the windpipe
   • the air sac
   Check

2. 2. What is the larynx?

   • a lung
   • a rib muscle
   • an air sac
   • the voice box
   Check

3. 3. What does the trachea divide into?

   • many air sacs
   • two lungs directly
   • the diaphragm
   • two bronchi
   Check

4. 4. What are bronchioles?

   • the voice box
   • small tubes that branch from the bronchi
   • the muscles between the ribs
   • large blood vessels
   Check

5. 5. Where do the bronchioles end?

   • in the heart
   • in the larynx
   • in tiny air sacs
   • in the stomach
   Check

6. 6. What are the intercostal muscles?

   • muscles in the heart
   • muscles in the legs
   • muscles in the stomach
   • muscles between the ribs
   Check

7. 7. What is the function of the ribs in the respiratory system?

   • to make sounds
   • to make oxygen
   • to store air
   • to protect the lungs and help them expand
   Check

8. 8. What is the diaphragm?

   • a sheet of muscle below the lungs
   • a tube to the lungs
   • a rib
   • an air sac
   Check

9. 9. What is the correct pathway for air entering the lungs?

   • trachea → bronchus → bronchiole → air sac
   • bronchiole → trachea → air sac → bronchus
   • bronchus → air sac → trachea → bronchiole
   • air sac → bronchiole → bronchus → trachea
   Check

10. 10. Which part has rings of cartilage to keep it open?

    • the trachea
    • the intercostal muscles
    • the air sacs
    • the diaphragm
    Check

11. 11. What is the main job of the respiratory system?

    • to take oxygen into the body and remove carbon dioxide
    • to pump blood
    • to make hormones
    • to digest food
    Check

12. 12. Where does air enter the body?

    • through the skin only
    • through the ears
    • through the nose or mouth
    • through the stomach
    Check

13. 13. Why does the nose help when breathing in?

    • It makes the air colder.
    • It removes oxygen.
    • It adds carbon dioxide.
    • It warms, moistens and filters the air.
    Check

14. 14. How many lungs do humans have?

    • 2
    • 1
    • 4
    • 3
    Check

15. 15. Which part is a plural word for many small tubes?

    • diaphragm
    • trachea
    • larynx
    • bronchioles
    Check

16. 16. What does the larynx (voice box) contain that vibrates to make sounds?

    • rings of cartilage
    • vocal cords
    • air sacs
    • bronchioles
    Check