instruction:
In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
question:
Question: If Jim lowers the temperature of water in his bathtub, what happens to the density of the water?
Answer: increases
answer:
Water becomes more dense when it is colder and when it has more salt.

question:
Question: Milo lives in a small city, but the city has recently begun to experience an influx of people moving to it. As people move there and demand for water decreases, what happens to the availability of water in Milo's city?
Answer: increases
answer:
The availability of water is projected to get worse as demand increases.

question:
Question: John was looking at the rock layers at the bottom of the cliff. He saw that as the layers became deeper, they also became
Answer: older
answer:
The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.