1. Was the rate of transpiration increased for all plants tested?
2. Did any of the environmental factors (heat, light, or wind) increase the transpiration rate more than the others? Why?
3. Which species of plants that you tested had the highest transpiration rates? Why do you think different species of plants transpire at different rates?
4. Transpiration in plants is driven by which of the following?
a. Gravity
b. Capillary action
c. Static electricity
d. All of the above
5. Which of the following statements about stomata is true?
a. They are found on plant roots.
b. They permit the intake of carbon dioxide.
c. They permit the intake of oxygen.
d. All of the above.
6. Water can be lost by a plant through which process(es)?
a. Evaporation
b. Transpiration
c. Condensation
d. A and B
7. Which environmental condition in your experiments served as the control?
a. Heat
b. Wind
c. Light
d. None of the above
8. In your experiments, transpiration was observed by which of the following?
a. Directly measuring the amount of water leaving the leaves through transpiration.
b. Directly measuring the amount of water leaving the leaves through evaporation.
c. Directly measuring the amount of water absorbed through the plant sprig’s stem.
d. All of the above.
9. Which environmental condition(s) always led to an increase in transpiration rate in each plant tested?
a. Heat
b. Wind
c. Light
d. A and B
e. All of the above
10. Wind did not have the greatest effect on transpiration rate in which plant type?
a. Arrowhead
b. Geranium
c. Rubber Plant
d. Weeping Plant
e. None of the above
11. Colder temperatures cause stomata to remain closed. Based on this information, if a plant were grown below 21oC, what would you expect transpiration rates to do?
a. Increase
b. Decrease
c. Remain the same
12. Wind appeared to increase the rate of transpiration in most plants tested. This is most likely due to which fact?
a. Humidity was increased
b. Evaporation was increased
c. Stomata were forced to close
d. All of the above
13. Cacti grow in arid regions such as deserts. Compared to other plants, b transpiration in cacti would most likely be which of the following?
a. Lower
b. Higher
c. The same
14. Describe the process of transpiration in vascular plants.
15. Describe any control groups used in the investigation.
16. What environmental factors that you tested increased the rate of transpiration?
17. Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected?
18. Of what value to a plant is the ability to lose water through transpiration?
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