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: Katie has a garden and she installs a small waterfall. Since Katie sets the water to flow very slow and gentle over the sloping fall, the erosion at the bottom of the waterfall will be 
 Answer: less

A: A gentle slope favours slower flow of surface water, reduces erosion, and increases availability of water to plants.
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Q: Question: If Mona is observing two objects and she realizes that one has a smaller mass then the other, what does that tell her about that object's thermal energy? 
 Answer: it's smaller

A: An object with more mass has greater thermal energy than an object with less mass because it has more atoms.
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Q: Question: One side effect of driving cars is the production of greenhouse gases. If fewer cars are put on the roads, what would happen to the greenhouse effect on the Earth's atmosphere? 
 Answer: it would become smaller

A:
An increase in greenhouse gases leads to greater greenhouse effect.
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