Question

high demand questions
questionsheet 16
the diagram shows the carbon cycle.
(a) in what form does carbon exist in the atmosphere?
1
(b) what process is represented by,
(i) arrow 1?
1
(ii) arrow 2?
1
(iii) arrow 5?
1
(iv) arrow 6?
1
(c) in 1978 the amount of carbon released into the atmosphere by process 6 was 4.8 billion tonnes.
in 1998 this had risen to 5.4 billion tonnes.
calculate the percentage increase in the amount of carbon released.

Explanation:

Step1: Calculate the increase in carbon amount

The increase in carbon amount is \(5.4 - 4.8=0.6\) billion tonnes.

Step2: Calculate the percentage increase

The formula for percentage increase is \(\frac{\text{increase}}{\text{original amount}}\times100\%\). Substitute the values: \(\frac{0.6}{4.8}\times 100\%\)

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Answer:

\(12.5\%\)