Refer to the illustration above. Amy wants to test the hypothesis that the rate of photosynthesis is directly related to the light level to which plants are exposed. She has chosen the aquatic plant Elodea as her study organism. In her experimental design, she has four different tanks in which she will place Elodea plants. Each Elodea plant will be placed inside an inverted test tube. She plans to estimate the relative rate of photosynthesis by measuring the amount of oxygen produced by plants placed under different light levels. She plans on comparing the amount of oxygen gas that collects in the top of each of the test tubes. Her experimental set-up looks like this:

Amy plans to place tank #3 next to a window in the classroom. She plans to place tank #2 ten feet away from the window. She plans to place tank #1 twenty feet away from the window. She plans to place tank #4 in the classroom's refrigerator, because it is the only place she can find that is dark. Write your answers to the following in the spaces below.
a. What is wrong with the design of Amy’s experiment?
b. What could Amy change in her experimental design to make it a better experiment?

Placing plants in the tank is wrong with the design of Amy’s experiment because placing plants in a closed tank will not experience any type of light. Amy have to change the medium i. e. tank for the plants and place plants in other pot which is not closed or used another plant that can be planted in the soil not water will be better for her experimental design which make it a better experiment.

bratislava bratislava · Answer 2 · 2022-01-14T06:34:01+01:00

Amy she wants to test the hypothesis that the rates of photosynthesis are directly related to the levels to which the plants are exposed.

She uses an estimated rate of the photosynthesis by measuring the amounts of O2 that is made by the plants and compares them on the basis of different levels.

As per her experiment, some changes need to be made such as the placement of plants in the tank.

The avoidance to any closed container and use another type for the plant. Amy needs have to change the medium i. e. tank for the plants which can be planted in the soil, and not the water will be better for her experimental design.

Learn more bout the refer to the illustration above.

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