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: Greta gained weight after eating food. Her force of gravity 
 Answer: increased
answer:
Objects with greater mass have a stronger force of gravity.


question:
Question: The pulling force of a rubber band will _____ when you move your hands apart. 
 Answer: increase
answer:
The farther apart you move your hands, the stronger the force of the rubber band pulling your hands together.


question:
Question: If air warms, it becomes _____ dense. 
 Answer: less
answer:

Warm air is less dense than cool air, so it rises higher in the troposphere.