Fireworks are an example of a chemical change.

Choose 1 answer

True

False

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Put these in order, from when tea leaves are picked to when a cup of tea is consumed.

Sort the options into the correct order.

Tea leaves are grown and picked.

After they are picked, oxidation occurs. This allows for the leaves to turn brown.

Hot water is added to the leaves. This extracts some chemicals from the leaves like caffeine.

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Which of these statements best describes a chemical reaction?

Choose 1 answer

Two substances mixing together and exploding.

When a liquid heats up and produces gas.

Molecules of one substance breaking apart and joining together with those of another substance.

Chemicals bubbling together and changing.

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How is a molecule made?

Choose 1 answer

With water and air.

When a chemical burns.

When two or more atoms join together.

By freezing atoms.

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How many atoms are there in an oxygen molecule?

Choose 1 answer

1

2

3

4

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Answer incorrect

Look at the slide below to work out the answer.