NCEA L1 Science Practice Questions - NCEA Level 1 Science - New Zealand Exam

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A Year 11 student investigates how light intensity affects the rate of photosynthesis in Elodea water plants by placing a lamp at distances of 10 cm, 20 cm, 30 cm, and 40 cm from the plant. What is the independent variable in this investigation?

The rate of photosynthesis measured in oxygen bubbles per minute The distance between the light source and the Elodea plant The temperature of the water bath surrounding the plant The concentration of sodium bicarbonate added to the water

Correct Answer:

The distance between the light source and the Elodea plant

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