The proportions of different gases in the atmosphere

Chemistry (Combined Science) · GCSE · AQA · AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher · Specification point · 5.9.1.1 · Chemistry of the atmosphere · The composition and evolution of the Earth's atmosphere

Composition of the Earth's atmosphere

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5.9.1.1 The proportions of different gases in the atmosphere

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$For 200 million years, the proportions of different gases in the atmosphere have been much the same as they are today: about four-fifths (approximately 80%) nitrogen about one-fifth (approximately 20%) oxygen small proportions of various other gases, including carbon dioxide, water vapour and noble gases.$	$MS 1c To use ratios, fractions and percentages.$

The proportions of different gases in the atmosphere (5.9.1.1) | AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher | KnowledgeSet