How to do this task:
- Soak a terracotta pot in water overnight.
- Next day, place a container of juice in the tray, e.g., yoghurt container. Place the terracotta pot over this and block the hole at the top with plasticene. Next half-fill the tray with tap water.
- Once set-up as illustrated, place this and another yoghurt container of juice in a sunny place outside.
| a) |
Record the temperature of the juice in both containers of juice every 3 minutes for the next 30 minutes. (Remove the plasticene to do this).
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| b) |
Write a summary of what your results show.
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| c) |
Explain how your "fridge" works.
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| d) |
Who might find this "type of fridge" useful?
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| e) |
Parts of this investigation may not be considered to be a "fair test".
Explain one way this investigation may not meet the requirements of being a "fair test".
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