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Earth's first atmosphere

Earth's first atmosphere

The atmosphere is the layer of gases held around Earth by gravity. Earth formed about 4.6 billion years ago, and gases released by volcanoes probably built up to form its early atmosphere.

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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