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Experiment No. 10

Question: How do the Alveoli work?


Experiments: To examine how the alveoli increase the lungs surface area.


You will need:

Sellotape, scissors,
1 sheet of blue card (18 inches x 6 inches),
lots of sheets of white card (6inches x 4 inches).


1. Bend the large blue sheet into a cylinder. Tape the edges. This represents the outside of a lung.

2. Make tubes from the white card. Use elastic bands to secure their shape. These represent the alveoli for the inside of the lung.

3. Place the white tubes inside the large lung blue lung until it is full.

4. Now unravel the alveoli tubes and spread them out flat.

Here comes the Science bit !

5. You have increased the surface area of your lung greatly by adding just a few alveoli tubes.

6. Imagine how great the oxygen absorbing surface area of a real lung is with millions of alveoli packed inside.

Sixth Class Experiments

1. Can Water Move up a Flower?

How can you show that water moves through the branch of a tree and its leaves?

3. How can you see the roots of a plant grow if they're underground?

4. Can a plant beat an obstacle course and grow towards what it needs?

5. Can you grow your own mould?

6. How can I catch spores?

7. What causes us to feel breathless?

8. Can you prove that humans breathe out CO2?

9. How do the lungs work?

10. How do the Alveoli work?

11. What happens when Yeast has sugar to feed on?

12. What is Diffusion?

13. How does the selective barrier in a cell work?

14. Are cells in vegetables damaged when they're cooked?

15. How hard does the heart work?

16. How can you see your pulse?

17. How can you discover if food contains starch?

18. How can you discover if food contains protein?

19. How can you discover if food contains fat?

20. How can you discover if food contains Vitamin C?