Which change to the experimental design would improve the reliability of the engineers’ measurements?

1. Collect one 200-milliliter (mL) sample of soil from each of three locations. 2. Place each soil sample in a beaker. 3. Add 200 mL of water to each sample and allow the water to saturate the soil. 4. Measure the amount of standing water in each beaker (amount of water the soil did not absorb). 5. Determine... show more 1. Collect one 200-milliliter (mL) sample of soil from each of three locations.

2. Place each soil sample in a beaker.

3. Add 200 mL of water to each sample and allow the water to saturate the soil.

4. Measure the amount of standing water in each beaker (amount of water the soil did not absorb).

5. Determine the amount of water in the soil sample by subtracting the amount of standing water from 200 mL.

6. Divide the amount of water in the soil sample by 200 mL and multiply by 100 to determine the percent porosity of the soil.

Which change to the experimental design would improve the reliability of the engineers’ measurements?


A.using a liquid other than water to determine porosity


B.using flasks instead of beakers



C.testing single samples from more than three locations


D.testing more samples from each location
2 answers 2