The effect of light intensity on rate of photosynthesis in algae: practical

12 questions

1. Wat are the reactants in photosynthesis?
2. As algae photosynthesise, what will happen to the concentration of carbon dioxide in the water?
3. What is an independent variable?
4. What is a control variable?
5. When investigating the effects of light intensity on the rate of photosynthesis, which of the following are control variables?
6. Why is it important to control the temperature in this experiment?
7. What is an accurate measurement?
8. How can you use the equipment shown to measure the rate of photosynthesis?
9. Why does photosynthesis lead to a colour change in the indicator solution?
10. How can you reduce the intensity of the light that the pondweed receives from the lamp?
11. If the indicator changes from cherry red to purple, what does this tell you about the rate of photosynthesis?
12. What is a logical prediction for this investigation?

License: OGL