| Information: The boiling of water removes dissolved gases. |
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a) |
What is the aim of this experiment? |
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| b) | In this experiment, what are three variables that need to be kept the same? | |
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1.
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| 2. |
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| 3. |
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| c) |
Why were two nails used in each test tube?
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| d) | i) |
At the end of the investigation, the nails in which test tube would have shown the greatest change?
Test tube:__________ |
| ii) |
Describe what the nails in this test tube would look like.
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| e) |
A second experiment was set up as shown below.
What do you think is the aim of this experiment?
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| Information: Calcium chloride is a drying agent, this removes moisture from the air. |
