Page 11 - 新思维科学学生用书9 样章

1 Photosynthesis and the carbon cycle

Continued

Questions
1 Calculate the mean number of bubbles for each distance of the lamp from the

test tube.
2 Plot a graph of your results.
• Put distance of lamp from the test tube on the x-axis. Remember to include
units.

• Put mean number of bubbles per minute on the y-axis.
• Plot your points as small, neat crosses.
• Draw a line to show the trend in your results.
3 Light intensity means the amount of light. Copy and complete this sentence:

As the distance of the lamp from the test tube increases, the light intensity ................ .
4 Now write a conclusion for your experiment, by copying and completing this
sentence:
As the light intensity increases, the rate of photosynthesis ................. .

Peer assessment
Exchange your results chart with a partner (not the person who worked with you on
your experiment).
How well did they construct and complete their results chart?

Give them a mark, from 0 to 2, to show how well they did on each of the five
statements below:
0 if they did not try, or you think they could do better
1 if you think they did quite well

2 if you think they did really well
• They drew a results chart using a ruler and pencil, so that it was easy for you to
read.

• They wrote a heading for the distance of the lamp from the test tube, including
units.
• They wrote a heading for the number of bubbles per minute.

• They included a column or row for the mean number of bubbles per minute.
• Overall, it was really easy to understand everything in the results chart.
If you gave your partner two marks for everything, the best possible score would
be 10. How many marks did you give them out of 10? If it was less than 10, explain
to them what they could do better.
If you were asked to draw another results chart in the future, how could you do it better?

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