The oceans absorb about a quarter of the carbon dioxide released by people. What harmful effect does this have on the sea?

The water becomes saltierCorrect answerYour answerThe water becomes more acidic, making it harder for corals and shellfish to build shellsCorrect answerYour answerThe water freezes more easilyCorrect answerYour answerThe oxygen in the water turns into ozoneCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

Dissolved carbon dioxide forms carbonic acid, lowering the pH of sea water.
More acidic water dissolves calcium carbonate, the material of shells and coral skeletons. This is ocean acidification.

Concept: Ocean acidification
Typical timeTypical: 60 s
Your timeYours: —

The rule this testsClimate change

Practise this chapter →

Ten questions from Pollution, Climate and Conventions, at your own pace.

Practise this chapter →

Ten questions from Pollution, Climate and Conventions, at your own pace.

Practise this chapter All 67 questions in Pollution, Climate and Conventions Revise the notes for Pollution, Climate and Conventions

The oceans absorb about a quarter of the carbon dioxide released by people. What harmful effect does this have on the sea?

Explanation