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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

How Carbon Dioxide Decreased (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'How Carbon Dioxide Decreased' from the broader topic Chemistry Of The Atmosphere. The test is geared towards the AQA exam board style syllabus.
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What visible change in limewater is used in the laboratory to show carbon dioxide is present (a test often used when demonstrating CO2 uptake and release)?
Which effect on seawater is caused by increased atmospheric CO2 dissolving into the oceans?
Which chemical formula represents calcium carbonate, the main mineral in limestone that stores carbon?
Which human activity today reverses the ancient processes that reduced atmospheric CO2 (thus increasing CO2 instead)?
Which is a direct chemical consequence when CO2 dissolves into seawater and forms carbonic acid?
Which gas concentration increased as a direct consequence of the processes that decreased CO2 in Earth’s atmosphere?
When carbon dioxide dissolves in seawater and forms bicarbonate ions, what is the immediate chemical change that explains CO2 removal?
Which process does NOT help decrease atmospheric CO2 over long timescales?
Which of the following best describes why limestone formation is considered a long-term carbon sink?
Which statement best describes why CO2 decreased while oxygen increased in the atmosphere billions of years ago?
Which of the following is a modern engineered technique that aims to mimic geological CO2 removal (a long-term decrease pathway)?