Q: Which best describes why winds at the beach change direction between day and night?

OPTIONS:
- because the temperatures over land and over water change
- because warm air over land sinks and stays in place over land
- because cool air rises and is replaced by warm air from the ocean
- because cool air sinks and stays in place over land
A: because the temperatures over land and over water change
Q: At what temperature does pure water boil?

OPTIONS:
- 0C
- 32C
- 100C
- 212C
A: 100C
Q: Which property of an object can be described as smooth?

OPTIONS:
- color
- odor
- size
- texture
A: texture
Q: Water at 20C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly?

OPTIONS:
- Cover it.
- Heat it.
- Place it in the dark.
- Put salt in it.
A:
Heat it.