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Chapter overview
Study Air and Atmosphere through notes, flashcards, revision, MCQs, and long-answer practice.
Practice ready
11613 MCQs and 6012 written prompts are ready for focused chapter work.
Topics
4
Recall
12
Cards
24
Topic 1
Air is a mixture, not a compound.
Topic 2
Oxygen is needed for combustion.
Topic 3
Acid rain forms when acidic gases dissolve in rainwater.
Topic 4
Oxygen supports burning but is not itself a fuel.
Chapter pack
Topic list
Topic 1
Air is a mixture of gases, mainly nitrogen and oxygen, with smaller amounts of carbon dioxide, noble gases, and water vapour.
Topic 2
Combustion is burning in oxygen. Some substances gain mass during burning because oxygen combines with them.
Topic 3
Oxides of sulphur and nitrogen can form acids in the atmosphere, causing acid rain and harming buildings, water bodies, plants, and health.
Topic 4
Oxygen is a colourless, odourless gas that supports combustion and respiration.
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