Weather Patterns

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Weather Noun

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[weth-er]

Back

Weather

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The atmospheric conditions, along with short-term changes, of a certain place at a certain time.

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Example: A weather station board with icons helps students identify different weather conditions.

Front

Meteorologist Noun

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[mee-tee-er-ol-uh-jist]

Back

Meteorologist

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A scientist who studies and predicts weather patterns and atmospheric conditions.

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Example: A meteorologist presenting a weather forecast to explain weather predictions.

Front

Air Pressure Noun

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[air presh-er]

Back

Air Pressure

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The force exerted by the weight of air molecules in the atmosphere on a surface.

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Example: Arrows show air molecules pressing down on a surface, illustrating air pressure.

Front

Humidity Noun

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[hyoo-mid-i-tee]

Back

Humidity

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The amount of water vapor, which is the gaseous state of water, present in the air.

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Example: Different numbers of water droplets show how much water vapor is in the air at various humidity levels.

Front

Precipitation Noun

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[pri-sip-i-tey-shuhn]

Back

Precipitation

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Any form of water that falls from clouds and reaches Earth's surface.

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Example: Rain and snow falling from clouds show precipitation reaching Earth's surface.

Front

Air Mass Noun

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[air mas]

Back

Air Mass

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A large body of air that has nearly uniform temperature, humidity, and pressure.

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Example: This map shows different air masses over North America, labeled by type, illustrating how they affect weather.

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Troposphere Noun

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[troh-puh-sfeer]

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Troposphere

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The lowest layer of Earth's atmosphere, where most weather occurs.

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Example: The image shows the troposphere as the lowest layer of Earth's atmosphere where weather occurs, with clear labels and altitude markers.

Front

Jet Stream Noun

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[jet streem]

Back

Jet Stream

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A narrow band of very strong, high-altitude winds that flow from west to east.

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Example: The image shows the jet stream as a colorful band of strong winds flowing from west to east over North America.

Front

High-Pressure System Noun

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[hahy-presh-er sis-tuhm]

Back

High-Pressure System

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A large body of circulating air with high pressure at its center, associated with sinking air and fair weather.

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Example: Arrows show air sinking in a high-pressure system, leading to clear skies.

Front

Low-Pressure System Noun

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[loh-presh-er sis-tuhm]

Back

Low-Pressure System

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A large body of circulating air with low pressure at its center, associated with rising air and precipitation.

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Example: Arrows show air rising and circulating, illustrating a low-pressure system.