Question

1. a student wants to determine the effect of soil type on plant growth. he sets up four pots as shown below. how could this experiment be improved?

o all four pots should have the same kind of soil.
o all four pots should have the same kind of seed, the same amount of light, and the same amount of water.
o the four pots should have different amounts of water.
o there is nothing wrong with this experiment.

Explanation:

To determine the effect of soil type on plant growth, other variables like seed type, water amount, and light should be controlled. In the experiment, there are different seeds and different amounts of water, which confound the results. All four pots should have the same kind of seed and the same amount of water.

Answer:

The four pots should have the same kind of seed, the same amount of light, and the same amount of water.