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.

[Q]: Question: If John increases the rate at which gas exits the bottom of his rocket, what will happen to the upward momentum of the rocket? It will 
 Answer: increase
[A]: The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.


[Q]: Question: Tony drives an SUV that contributes many greenhouse gases to the atmosphere. Evan rides a scooter that contributes few greenhouses gases to the atmosphere. Who likely contributes more to the Earth heating up? 
 Answer: Tony
[A]: If there are more greenhouse gases in the atmosphere, more ultraviolet radiation will be trapped and the Earth will heat up.


[Q]: Question: Katie wants to get light to turn to rainbow colors by using a lens to filter the light through. In order to get the least colors, Katie will use a lens that is 
 Answer: flat
[A]:
The more curved the surface of a lens is, the more it refracts the light that passes through it.