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WalesChemistryQuick questions
Unit 1: The Earth, Atmosphere and Resources
Quick questions on The Earth's atmosphere and its evolution - WJEC GCSE Chemistry (1.4)
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
State the percentage of oxygen in the atmosphere today. [1 mark]
What is q2?Show answer
Name the process by which early plants and algae added oxygen to the atmosphere. [1 mark]
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