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.
Practise Edexcel GCSE Chemistry Earth and atmospheric science with exam-style questions for Foundation and Higher tier. 62 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
