Answer: it acts as a water filter as groundwater moves through it
Explanation:
Soil is a medium in which life is sustained through plant growth, the recycling of matter and nutrients, and the purification and cycling of water. Soil can act as a sponge to purify water, and thus plays a role in water quality.
An error is that the scientist did not control their variables. They had one group of people playing the game at 6, and another group playing at 12. This means that other things might have affected the scores other than what was being tested, which was caffeine.
Fog begins to form when water vapor condenses into tiny liquid water droplets that are suspended in the air.
