Atmosphere and Weather

Front

What is the definition of air density?

Back

Air density is the mass of air per unit volume, indicating how much mass is contained in a given volume of air.

Front

What happens to air pressure as altitude increases?

Back

Air pressure decreases as altitude increases because there is less air above pushing down.

Front

What is the composition of Earth's atmosphere?

Back

Earth's atmosphere is composed mainly of nitrogen (78%) and oxygen (21%), with other gases making up about 1%.

Front

What is evaporation?

Back

Evaporation is the process by which water changes from a liquid to a gas (water vapor) due to heat.

Front

What is the role of the sun in the water cycle?

Back

The sun provides the energy needed for evaporation, which is a key part of the water cycle.

Front

What is a land breeze?

Back

A land breeze is a local wind that occurs at night when land cools faster than water, causing air to move from land to sea.

Front

What is humidity?

Back

Humidity is the amount of water vapor present in the air, often expressed as a percentage.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.

Front

What is the difference between weather and climate?

Back

Weather refers to short-term atmospheric conditions, while climate refers to long-term average weather patterns in a region.

Front

What is condensation?

Back

Condensation is the process by which water vapor cools and changes back into liquid water, forming clouds.