Science 6 · Unit 1: The human body · Cambridge Primary Science Stage 6

Questions

1. 1. Which organs do we use for breathing?

   • the heart
   • the lungs
   • the kidneys
   • the stomach
   Check

2. 2. What protects the lungs?

   • the skull
   • the spine only
   • the ribs
   • the diaphragm
   Check

3. 3. Which tube carries air from the nose and mouth to the lungs?

   • the oesophagus
   • the windpipe
   • a vein
   • an artery
   Check

4. 4. Which gas moves from the lungs into the blood?

   • water vapour
   • nitrogen
   • oxygen
   • carbon dioxide
   Check

5. 5. Which gas do we get rid of when we breathe out?

   • nitrogen
   • oxygen
   • carbon dioxide
   • helium
   Check

6. 6. What does the diaphragm do when you breathe in?

   • moves sideways
   • relaxes and moves up
   • stays still
   • contracts and moves down
   Check

7. 7. What do the ribs do when you breathe in?

   • move downwards and inwards
   • break
   • stay still
   • move upwards and outwards
   Check

8. 8. What happens to your chest when you breathe out?

   • It fills with air.
   • It stays the same.
   • It gets smaller and air is pushed out.
   • It gets bigger.
   Check

9. 9. In a model of breathing, what does the balloon at the bottom of the bottle represent?

   • the windpipe
   • the diaphragm
   • the ribs
   • the lungs
   Check

10. 10. In the breathing model, what does the balloon inside the bottle represent?

    • the heart
    • the ribs
    • the diaphragm
    • a lung
    Check

11. 11. Which part of the chest is not shown by the bottle model?

    • the ribs
    • the windpipe
    • the diaphragm
    • the lungs
    Check

12. 12. About how many times a minute do we breathe at rest?

    • about 2
    • about 100
    • about 16
    • about 500
    Check

13. 13. What is breathing rate?

    • the number of heartbeats
    • the number of breaths in one minute
    • how long you can hold your breath
    • how deep a breath is
    Check

14. 14. How does exercise affect breathing rate?

    • It stops.
    • It goes down.
    • It goes up because the body needs more oxygen.
    • It doesn't change.
    Check

15. 15. Why can you blow up a balloon?

    • Air is pushed out of your lungs into it.
    • The balloon sucks air in.
    • Your stomach fills it.
    • Your heart pumps air.
    Check

16. 16. Class 5 found that people with a higher breathing rate after jogging also had a higher pulse rate. What does this show?

    • They are not linked at all.
    • Pulse rate goes down when breathing goes up.
    • Breathing makes the heart stop.
    • Breathing rate and pulse rate both rise together with exercise.
    Check

17. 17. What happens to the blood after it picks up oxygen in the lungs?

    • It goes to the heart and is pumped to the rest of the body.
    • It is breathed out.
    • It stays in the lungs.
    • It goes to the stomach.
    Check