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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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Which example illustrates a negative feedback that could reduce atmospheric CO2 over long timescales?
Which reaction shows how calcium ions combine with carbonate ions in seawater to form limestone, removing dissolved carbon?
Which of these is evidence from rocks that supports a past decrease in atmospheric CO2?
Which geological process stores atmospheric carbon dioxide as solid rock and so reduced CO2 levels over long time scales?
Which chemical formula represents calcium carbonate, the main mineral in limestone that stores carbon?
Which is a direct chemical consequence when CO2 dissolves into seawater and forms carbonic acid?
Which statement best describes why CO2 decreased while oxygen increased in the atmosphere billions of years ago?
Which action would increase the long-term geological removal of atmospheric CO2?
Which of the following is a modern engineered technique that aims to mimic geological CO2 removal (a long-term decrease pathway)?
Which effect on seawater is caused by increased atmospheric CO2 dissolving into the oceans?
Which process does NOT help decrease atmospheric CO2 over long timescales?