You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

[Q]: Paragraph: The closer together the particles in a longitudinal wave are, the greater the amplitude.
 Question: If Mona creates a longitudinal wave and decreases the distance of the particles in the wave, what happens to the amplitude of that wave? 
 Choices: A)increases 
B)decreases
[A]: decreases


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


[Q]: Paragraph: Richer nations use far more energy resources, especially fossil fuels, than poorer nations do.
 Question: John is from the US. When he visited a third world country, he noticed the use of energy resources there was 
 Choices: A)more 
B)less.
[A]:
less.