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ZingPath: Weather Prediction

Atmospheric Movement and Pressure

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Weather Prediction

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Lesson Focus

Atmospheric Movement and Pressure

Earth & Space Science

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You get to learn the difference between weather and climate and try your skill at weather and hurricane prediction. You will also learn about the gases that make up the Earth’s atmosphere.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • State that atmospheric pressure causes changes in the weather.
  • Define low pressure.
  • Define high pressure.

Everything You'll Have Covered

Define a low-pressure system.

As the sun's rays hit the Earth, they heat the air. The mass of the air doesn't change, but the volume does. As the volume increases due to the increased heat, the density of the air decreases. The lighter, low-density air rises and lowers the air pressure of the region.

Define a high-pressure system.

As the sun's rays hit the Earth, they heat up the air. However, the sun's rays reach the Earth at various angles. Places where the rays hit the Earth at greater angles receive less sunlight over a larger area of land. Because of this, the air isn't heated as much, and the air becomes denser. The heavier, denser air sinks and increases the air pressure of the region.

How is wind created, and what effect does it have on regions?

Wind is created due to the differences between air pressures in regions. Air moves from high-pressure regions to low-pressure regions, and wind is created. The origin of the wind dictates whether it has a heating or a cooling effect. Winds that come from regions near the equator generally have a heating effect, while winds that come from the poles generally have a cooling effect.

Tutorial Details

Approximate Time 2 Minutes
Pre-requisite Concepts Students should be able to define air pressure, high pressure system, and low pressure system.
Course Earth & Space Science
Type of Tutorial Animation
Key Vocabulary air pressure, high pressure system, low pressure system