Page 25 - 新思维科学活动用书9 样章

1 Photosynthesis and the carbon cycle

Practice

2 Look at graph A.

Describe in words what is shown on the graph. Include some figures in your answer, for example
by stating the change in sea level since 1880.

3 Look at graph B.

Describe two ways in which the extent of sea ice in the Bering Sea in 2017 to 2018 differed from
the mean extent from 1979 to 2016.

1st way

2nd way

Challenge

4 Look at graph B again.
What extra data would you want to collect, in order to be certain that the extent of sea ice really

is changing? Explain your answer.

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