Question

question 3 of 10
to test how fertilizer affects tomato plants, a farmer divided a field of young
tomato plants into 10 plots of equal size. the farmer then put fertilizer on half
of the plots and no fertilizer on the other half of the plots. which factor is
tested in this experiment?

a. brand of fertilizer
b. amount of fertilizer
c. age of plants
d. kind of plants

Explanation:

The experiment is about testing the effect of fertilizer. The key is to analyze each option:

• Option A: There is no mention of different brands of fertilizer in the experiment.
• Option B: The experiment has two groups - one with fertilizer and one without. This is testing the effect of the presence (amount = some) vs absence (amount = none) of fertilizer.
• Option C: The plants are all young (same age group as per the description "a field of young tomato plants").
• Option D: All plants are tomato plants (same kind).

Answer:

B. Amount of fertilizer