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: Wave frequency can be measured by counting the number of crests or compressions that pass the point in 1 second or other time period. The higher the number is, the greater is the frequency of the wave.
 Question: If there are less crests coming through, there will be _____ wave frequency. 
 Choices: A)more 
B)less
answer:
less


question:
Paragraph: Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.
 Question: Molly was viewing electromagnetic waves and noticed a wave with a wavelength of 20nm and another with 10nm. Which likely has more energy? 
 Choices: A)the 20nm wave 
B)the 10nm wave
answer:
the 10nm wave


question:
Paragraph: The more tightly packed the particles inside the material are, the more dense we say they are.
 Question: Sasha is throwing bottles into the lake. Some bottles are filled with sand, and some only have a tiny bit of sand in them. The bottles filled with sand will sink first because they are 
 Choices: A)less dense 
B)more dense
answer:
more dense