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


question:
Paragraph: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
 Question: DJ has a solution that he adds particles to. The solution is now a _____ concentration. 
 Choices: A)higher 
B)lower
answer:
higher


question:
Paragraph: With less ozone in the stratosphere, more UV rays reach the ground.
 Question: If Milo lives in a country that stops producing pollution which causes the ozone layer to increase, what happens to the amount of UV rays that can reach the ground? 
 Choices: A)increase 
B)decrease
answer:
decrease