How frequently does it rain in the month of August?
What is the difference in temperature at locations A and B at 12:00 noon?
What is the effect of sugar on yeast?
How does running affect heart rate?
What is the difference in the pH of the water in a clean aquarium versus a dirty aquarium?
What is the gestation period for a manatee?
How does temperature affect the growth of mold?
What are the similarities and differences among prokaryotes and eukaryotes?
How many insects are there in a given area?