Page 13 - 新思维科学活动用书9 样章
P. 13
1 Photosynthesis and the carbon cycle
2 Which variable does Sofia change in her experiment?
Tick (✓) the correct answer.
number of duckweed plants
volume of water
quantity of fertiliser
3 Which variables should Sofia keep the same in her experiment?
Tick (✓) all the correct answers.
number of duckweed plants
quantity of fertiliser
light intensity
volume of water
temperature
After two weeks, Sofia counts the number of duckweed plants in each dish. She writes the results in
her notebook.
A 5 plants B 9 plants
C 10 plants D 8 plants
E no plants
4 Complete the results chart.
Dish Number of grains of fertiliser Number of plants at end of experiment
A 0 5
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