Front

What is humidity?

Back

The amount of water vapor in the air.

Front

What is climate?

Back

Average weather conditions of a region year after year.

Front

What causes wind?

Back

Differences in air pressure.

Front

What is El Niño?

Back

An ocean current that is warmer than normal and recurs every few years in the Pacific Ocean.

Front

How does El Niño affect weather along the Pacific Coast of the United States?

Back

More water would evaporate into the atmosphere and lead to more rain.

Front

What is the difference between weather and climate?

Back

Weather is the conditions in one day, but climate is the conditions over a long time.

Front

What is precipitation?

Back

Any form of water, liquid or solid, that falls from the atmosphere to the Earth's surface.

Front

What is a warm front?

Back

A boundary where warm air replaces cooler air.

Front

What is air pressure?

Back

The force exerted onto a surface by the weight of the air above that surface in the atmosphere.

Front

What is a cold front?

Back

A boundary where cold air replaces warmer air.