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Carbon dioxide dissolves in the water in the Earth’s oceans - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Question 1
Carbon dioxide dissolves in the water in the Earth’s oceans. (a) Describe how these oceans were originally formed. (b) Some rocks are formed from dissolved carbon ... show full transcript
Worked Solution & Example Answer:Carbon dioxide dissolves in the water in the Earth’s oceans - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Step 1
Describe how these oceans were originally formed.
Answer
The oceans were formed primarily through the process of volcanic activity. Initially, water was in the form of water vapour or steam, which was released into the atmosphere. As the Earth cooled, this water vapour condensed and changed into liquid water, leading to the formation of the oceans.
Step 2
Describe how this happens.
Answer
The process of rock formation from dissolved carbon dioxide involves marine organisms that absorb carbon dioxide and use it to form shells. These shells predominantly consist of calcium carbonate. Over time, these shells accumulate to create sedimentary rocks.
Step 3