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 the Earth's orbit moves farther away from the Sun, what happens to the gravitational force between the two planets? 
 Answer: it decreases
answer:
This is because the gravitational force of attraction between the Earth and Sun is stronger when the Earth is closer to the Sun.


question:
Question: Peter removed salt to his juice one morning. The mixture became _____ dense. 
 Answer: less
answer:
If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser.


question:
Question: When light slows down it is more likely to 
 Answer: stay straight
answer:

In refraction of light, the greater the change in speed, the more light bends.