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: Jim puts his water in the oven for later. The molecules in the liquid 
 Answer: speed up
When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.

Question: If Jim has a container of hydrogen gas that is 50 liters in volume and he moves the gas to a container that is 40 liters in volume, what happens to the density of the gas? 
 Answer: increases
In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.

Question: Scientists discovered a region where there was a much larger amount of greenhouse gases getting caught in the atmosphere. Compared to other regions, this region's atmosphere will have a 
 Answer: higher temperature

More greenhouse gases trap more heat and warm the atmosphere.