Question

when the amount of water in a glass slowly decreases, this is due to
a. condensation
b. evaporation
c. sublimation
d. freezing

Explanation:

Evaporation is the process by which a liquid changes to a gas at temperatures below its boiling - point. When water in a glass slowly decreases, it is because water molecules gain enough energy to escape into the air as water vapor, which is evaporation. Condensation is the change from gas to liquid, sublimation is the change from solid to gas directly, and freezing is the change from liquid to solid.

Answer:

B. evaporation