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Atmosphere - GCSE Chemistry Definition

Reviewed by: Philippa Platt

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The atmosphere is a layer of gases surrounding the Earth, crucial for life, that extends from the planet's surface outward into space. It is primarily composed of nitrogen (about 78%) and oxygen (about 21%), with smaller amounts of other gases like carbon dioxide, argon, and trace gases.

The atmosphere plays a vital role in maintaining Earth's climate by regulating temperature and protecting living organisms from harmful solar radiation. It also facilitates the water cycle and supports processes like respiration and photosynthesis.

Understanding the composition and behaviour of the atmosphere is essential in GCSE Chemistry, as it helps students grasp concepts related to air quality, pollution, and the greenhouse effect.

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Philippa Platt

Reviewer: Philippa Platt

Expertise: Chemistry Content Creator

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener

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