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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

The Earths Early Atmosphere (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'The Earths Early Atmosphere' from the broader topic Chemistry Of The Atmosphere. The test is geared towards the AQA exam board style syllabus.
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Which of the following gases was NOT a major component of Earth’s early atmosphere soon after formation?
Which gas increased significantly only after photosynthetic organisms became abundant, rather than being abundant in the very earliest atmosphere?
What role did the formation of the ozone (O3) layer play in Earth’s atmospheric evolution?
Which sequence correctly shows a major long-term change in atmospheric composition from early Earth to modern atmosphere?
How did early oceans help reduce atmospheric carbon dioxide concentrations?
Which statement about methane (CH4) in the early atmosphere is correct?
Why is nitrogen now one of the most abundant gases in Earth’s atmosphere?
Which process is mainly responsible for the large increase in atmospheric oxygen about 2.5 billion years ago?
Which statement best describes the role of photosynthetic organisms in changing the early atmosphere?
What evidence in ancient rocks supports the idea that oxygen levels rose in Earth’s history?
Why is studying the composition of ancient rocks important for understanding Earth’s early atmosphere?