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: Dean turns the current down a lot, expecting that the resistance will 
 Answer: grow
answer:
When we add resistors in parallel to each other the total resistance decreases and the current increases.


question:
Question: Eric stopped rubbing a blanket on his arm. His arm gets warmer because the molecules inside get 
 Answer: slower
answer:

Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.