The troposphere is the layer of Earth's atmosphere that is _____________ Earth's surface.

You learned that the ocean has currents.

True or False: The troposphere has currents as well.

How many layers are there in Earth's atmopshere?

The different layers of Earth's atmosphere are defined by (separated based on) ________________________________.

Which gas makes up roughly 78% of Earth's atmosphere?

Which gas makes up roughly 21% of Earth's atmosphere?

The troposphere is heated from the ground up, so the temperature tends to ______________________ as the altitude increases.

True or False: Differences in air pressure are a driving force of weather, and weather systems.

Wind is the movement of ___________.

Wind blows from areas of _________________ pressure, toward areas of _________________ pressure.

On average, clouds cover ___________ % of Earth at any given time.

Clouds are carried through the atmosphere by _____________.

Which of the following weather events may exist with "stable air" conditions?

What is likely to happen when the air is unstable?

True or False:

The way Earth's atmosphere interacts with the sun's energy and the oceans helps determine Earth's average temperature and its different climate zones.

If Earth were not rotating, there would be _____ cells of circulating air.

Due to the Coriolis Effect (because of Earth's rotation), the direction of air (and water) currents bend, creating _____ cells of circulated air.

There are gases in the air that absorb and hold thermal energy that would otherwise escape from Earth. The gases are called the ____________________ gases.

There are gases in the air that absorb and hold thermal energy that would otherwise escape from Earth. This is called the _______________________ effect.

True or False:

By trapping some of the sun's energy (radiated energy), the atmosphere helps create and maintain the different climates on Earth.

Natural processes can add and remove greenhouse gases in the atmosphere. This helps to keep things in our atmosphere _____________________.

Almost all organisms require __________ in the atmosphere for essential life processes.

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