How can you reduce the temperature at which water boils?

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By increasing the pressure

By decreasing the pressure

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Under normal pressure, what temperature does water boil at?

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Correct Answer

Incorrect Answers

90⁰C

95⁰C

100⁰C

120⁰C

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Is sea water safe to drink?

Choose 1 answer

Yes

No

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Fill in the blanks

Select the missing words in the text.

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What is the first step in water treatment?

Choose 1 answer

Sterilisation

Passing the water through a filter made of sand and gravel

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Answer incorrect

Look at the slide below to work out the answer.