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: By removing a pound of salt from a bucket of fresh water, could you cause the density of the water to 
 Answer: decrease?
answer:
Water density increases as salinity and pressure increase, or as temperature decreases.


question:
Question: An increase in food will likely lead to _____ lifespans. 
 Answer: longer
answer:
New farm machines were invented. They increased the amount of food that could be produced. With more food, people were healthier and could live longer.


question:
Question: Ron pulled two balls away from each other. The balls now experience _____ gravitational force due to each other. 
 Answer: less
answer:

As the distance between the objects increases, the force of gravitational attraction decreases.