Which sequence best describes atmospheric evolution?
Ocean formation, volcanic gases, photosynthesis, oxygen increase
Volcanic gases, photosynthesis, ocean formation, oxygen increase
Volcanic gases, oxygen increase, ocean formation, photosynthesis
Volcanic gases, ocean formation, photosynthesis, oxygen increase
97 exam-style questions on Edexcel GCSE Chemistry 9.2 Earth and atmospheric science, covering 9.2.1 The Earth's early atmosphere, 9.2.2 How the atmosphere evolved, 9.2.3 Chemical test for oxygen, and 9.2.4 The greenhouse effect and climate change. Each one has a worked solution and a mark scheme showing where the marks go.