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Formation of the early atmosphere

Formation of the early atmosphere

Evolution of Earth's atmosphere from volcanic gases to the modern composition, including oceans, photosynthesis and oxygen evidence

Earth formed about 4.64.64.6 billion years ago. Volcanic activity released gases that built up an early atmosphere, probably containing mainly carbon dioxide and water vapour, with small amounts of nitrogen, methane and ammonia.

6.3 Interpreting and interacting with earth systems Lesson

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

Step-by-step lessons on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

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