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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

Earth's Early Atmosphere

A Catalyst article about how the study of ancient rocks and sediments can help deduce how the Earth's atmosphere has changed over billions of years. There used to be much less oxygen than there is today. This article describes how the composition of the atmosphere has changed through history; it also explains the link between atmospheric composition and life.

This article is from Catalyst: Secondary Science Review 2008, Volume 18, Issue 4.

Catalyst is a science magazine for students aged 14-19 years. Annual subscriptions to print copies of the magazine can be purchased from Mindsets.

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