How did outgassing contribute to Earth's development?

Correct answer: Gases from Earth's interior helped form the early atmosphere

Outgassing is the release of gases from Earth’s interior, mainly through volcanic activity. It supplied gases such as water vapour, carbon dioxide and nitrogen, helping to build the early atmosphere. The Sun’s core formed through the collapse of the solar nebula, not through Earth’s outgassing, so option B is incorrect. Exam tip: link outgassing with the early atmosphere and the later condensation of water vapour to form oceans.