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GCSE Combined Science · key term
The release of gases from inside the Earth, including through volcanic activity.
Used by OCR
Specification C6.2a · Chemistry Paper 2
Revise: Formation of the AtmosphereVolcanoes released gases from its interior, a process called outgassing. These gases accumulated around the planet and are thought to have formed its early atmosphere.
Chemistry, Combined Science
As its surface cooled and a crust formed, intense volcanic activity released gases from its interior. This release is called . It is thought to have produced an atmosphere rich in , with nitrogen and smaller amounts of other gases, but little or no oxygen.
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