Atmospheric Pressure and Cyclones
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Questions and Answers

What is atmospheric pressure?

The force per unit of area exerted on the Earth's surface by the weight of the air above the surface.

Atmospheric pressure is greater at higher altitudes.

False (B)

What is the standard atmospheric pressure defined as?

1013.27 hPa

What device is used to measure pressure?

<p>Barometer</p> Signup and view all the answers

What is a cyclone?

<p>A low-pressure system in the atmosphere where air pressure has dropped below the standard atmospheric pressure</p> Signup and view all the answers

Winds in a cyclone rotate inward in a counterclockwise direction in the northern hemisphere.

<p>True (A)</p> Signup and view all the answers

What are tropical cyclones?

<p>Tropical cyclones are a type of cyclone that develop over tropical oceans.</p> Signup and view all the answers

Flashcards

Atmospheric pressure

The force exerted on the Earth's surface by the weight of the air above it.

Millibars

Atmospheric pressure is measured in millibars.

Standard atmosphere

The standard atmospheric pressure at sea level.

Cyclone

An area of low pressure in the atmosphere.

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Anticyclone

An area of high pressure in the atmosphere.

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Barometer

A device that measures atmospheric pressure.

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Cyclones in the northern hemisphere

Cyclones in the northern hemisphere rotate counterclockwise.

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Cyclones in the southern hemisphere

Cyclones in the southern hemisphere rotate clockwise.

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Tropical cyclones

Tropical cyclones are powerful low-pressure systems forming over tropical oceans.

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Air movement in anticyclones

Warm air falls in anticyclones.

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High pressure in summer

Clear skies, gentle breezes, and fine weather are common with high pressure in summer.

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High pressure in cold conditions

High pressure can bring fog and mist in cold conditions due to condensation.

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High pressure in winter

High pressure in winter results in clear skies and colder temperatures.

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Altitude and pressure

Air pressure decreases as altitude increases.

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Cyclone characteristics

Cyclones are characterized by low pressure, inward rotating winds, and often storms.

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Anticyclone characteristics

Anticyclones bring settled weather, typically clear skies and dry conditions.

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Pressure at sea level

The pressure at sea level is typically higher than at higher altitudes.

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Standard atmosphere

The standard atmosphere is a reference point used for comparing atmospheric pressure.

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Anticyclones and fog

Anticyclones can lead to fog and mist in cold conditions due to condensation.

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High pressure in winter

High pressure in winter often brings clear skies and cold temperatures.

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Study Notes

Atmospheric Pressure

  • Atmospheric pressure is the force per unit area exerted on the Earth's surface by the weight of the air above the surface.
  • Air pressure is greater at the sea level and decreases with increasing altitude.
  • Standard atmosphere is defined as 1013.27 hPa.
  • Meteorological reports typically state atmospheric pressure in millibars.
  • Pressure measurement device is called barometer.

Low Pressure System - Cyclone

  • A cyclone is a low-pressure system of the atmosphere in which air pressure has dropped below the standard atmospheric pressure.
  • Winds rotate inward in a counterclockwise direction in the northern hemisphere and clockwise direction in the southern hemisphere.
  • Tropical cyclones, which develop over tropical oceans, are commonly characterized by intense low-pressure system, high wind speeds, and storm surges.

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Description

Explore the concepts of atmospheric pressure and low-pressure systems like cyclones in this quiz. Learn how air pressure varies with altitude, the definition of standard atmosphere, and the characteristics of cyclones. Test your knowledge on barometers and the dynamics of wind patterns in different hemispheres.

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