Q: Read the passage below and choose the right answer to the following question (choices are acidic or basic ):  Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.   If we tested a substance and the number was low on a pH test then the item is acidic or basic?
A: acidic


Q: Read the passage below and choose the right answer to the following question (choices are 10 crests or 5 crests ):  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.   Ron watches a wave for 10 seconds and notices 10 crests. He watches another wave for 10 seconds and sees 5 crests. Which wave has a lesser frequency 10 crests or 5 crests?
A: 5 crests


Q: Read the passage below and choose the right answer to the following question (choices are near the surface or deeper down ):  Lower rock layers were laid down earlier, so they are assumed to contain older fossils.   If Mona is excavating an archeological site and she discovers some fossils near the surface then compares them to fossils she found deeper down, which fossils will be older near the surface or deeper down?
A: deeper down


Q: Read the passage below and choose the right answer to the following question (choices are dense or thin ):  The density of the atmosphere decreases with an increase in the height above sea level (altitude).   Yolanda moved to Florida where it is at sea level. The atmosphere here is considered dense or thin?
A: dense