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: When a city contracts the distance across the city 
 Answer: decreases
answer:
As the Universe expands, galaxies move further and further apart.


question:
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
answer:
In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.


question:
Question: Dan is watching the ship approach the dock. While the ship is near him, it is massive. However, as the ship comes closer, it begins to look 
 Answer: bigger
answer:

If you are standing on the shore and a ship is going out to sea, the ship gets smaller as it moves further away from you.