Question

which of the following is the correct statement about air density and temperature? cool air is more dense than warm air because cool air expands warm air is more dense than cool air because warm air expands warm air is less dense than cool air because warm air expands cool air is less dense than warm air because cool air expands what is the measure of the amount of water vapor in the air? dew point evaporation humidity air pressure precipitation jasmine breathed against the window pane and noticed that her breath made a spot on it from the water vapor in her breath. which stage of the water cycle would this show? precipitation evaporation

Explanation:

1. When air is heated, it expands. Since density is mass per unit volume, with the mass remaining constant and volume increasing for warm air, warm air is less dense than cool air.
2. Humidity is the measure of the amount of water - vapor in the air. Dew - point is the temperature at which air must be cooled to become saturated with water vapor. Evaporation is the process of water changing from a liquid to a gas. Air pressure is the force exerted on a surface by the weight of the air above it. Precipitation is any form of water that falls from clouds to the Earth's surface.
3. When Jasmine breathes against the window pane and the water vapor in her breath forms a spot, this is a case of condensation where water vapor changes from a gas to a liquid. But among the given options, the closest related concept in a general sense to water - vapor changing state is precipitation which can be seen as a larger - scale version of water - vapor turning into liquid or solid forms. Evaporation is the opposite process of what is happening here.

Answer:

1. Warm air is less dense than cool air because warm air expands.
2. humidity
3. precipitation