GCSE Chemistry - Evolution of the Atmosphere | How the Atmosphere Changed Over Time (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** WHAT'S COVERED ** 1. The Earth's Early Atmosphere The role of intense volcanic activity in releasing gases. Composition of the early atmosphere, which was mostly carbon dioxide. 2. How the Atmosphere Began to Change Condensation of water vapour to form the oceans. The dissolving of carbon dioxide from the atmosphere into the oceans. 3. The Role of Photosynthesis The evolution of algae and green plants. How photosynthesis decreased atmospheric carbon dioxide and increased oxygen levels. 4. The Locking Away of Carbon How dead marine organisms formed sedimentary rocks like limestone. The formation of fossil fuels such as crude oil, natural gas, and coal from the remains of plants and plankton. ** CHAPTERS ** 0:00 Introduction to the Evolution of the Atmosphere 1:02 The Early Atmosphere & Volcanic Activity 1:50 The Role of Algae and Plants 2:37 Formation of Sedimentary Rocks & Fossil Fuels 3:43 Recap ** PLAYLISTS **    • KS3 Biology      • KS3 Chemistry      • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • A-Level Biology   #GCSE #Chemistry #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE #IB #AP