Starter quiz
- Which of the following will you find in the Earth's atmosphere?
- aluminium
- gold
- nitrogen ✓
- zinc
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- What percentage of the Earth's atmosphere is carbon dioxide?
- less than 1% ✓
- 1%
- more than 1%
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- Which word is used to describe a substance that contains two or more different substances which are not chemically combined?
- 'mixture' ✓
- Which word is used to describe the mass per unit volume?
- displacement
- density ✓
- velocity
- temperature
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- The atmosphere is ...
- the space that exists between Earth and the Sun.
- all the living organisms within an ecosystem.
- a layer of gas that surrounds a planet. ✓
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- Which gas in our atmosphere is essential for life on Earth?
- 'oxygen' ✓
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