Approximately 2.7 billion years ago, early photosynthetic organisms such as algae first evolved in the oceans and began releasing oxygen into the atmosphere.
Give the name of the process in these organisms that takes in carbon dioxide and water to produce glucose and oxygen.
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.