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.

[EX Q]: Question: Tina cools some oxygen gas. The oxygen particles will move 
 Answer: slower
[EX A]: If the gas is heated, the particles will move faster as they gain more energy.

[EX Q]: Question: Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has _____ friction than the sandpaper. 
 Answer: more
[EX A]: Rougher surfaces have more friction between them than smoother surfaces.

[EX Q]: Question: A small nation decided to lower its production capabilities and shut down several large factories. Would the river next to the factories have 
 Answer: less hazardous waste?
[EX A]:
Nations that have more industry produce more hazardous waste.