BI-967
Planning an investigation
Biology · Secondary 3 · Medium · Planning an investigation
A student sets up an experiment with an aquatic plant under a lamp to investigate how light intensity affects the rate of photosynthesis. She repeats the experiment at different distances from the lamp. Which two factors must she keep constant in every repeat to make the test fair?
- size of aquatic plant and time exposed to the light
- size of beaker and distance of lamp
- volume of water and distance of lamp
- time exposed to the light and volume of oxygen collected
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.