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Weather and Air Pressure Basics

Air pressure is caused by the weight of the air molecules in the atmosphere being pulled towards Earth by gravity. Weather is determined by differences in air pressure, with air moving from high to low pressure areas. Low pressure systems are associated with rising warm air and stormy conditions due to precipitation, while high pressure systems are associated with sinking cool air and stable, dry weather.

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Tanishka Padhye
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98 views2 pages

Weather and Air Pressure Basics

Air pressure is caused by the weight of the air molecules in the atmosphere being pulled towards Earth by gravity. Weather is determined by differences in air pressure, with air moving from high to low pressure areas. Low pressure systems are associated with rising warm air and stormy conditions due to precipitation, while high pressure systems are associated with sinking cool air and stable, dry weather.

Uploaded by

Tanishka Padhye
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Air Pressure

• Weather describes the _____________________________________________________________.


• Earth’s weather is caused by the ___________________________________________________.
Air Pressure
• All the air above you in the atmosphere is being held near Earth’s surface by ________________.
Air pressure is determined by the ___________________ exerted on the Earth by the weight of
tiny air _______________________ and ________________________.
• Molecules of air are in constant __________________, bumping against each other and
bouncing off in all directions.

Characteristics of Warm Air: Characteristics of Cold Air:


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Who is feeling more pressure on them? ______________ Why?________________________________


__________________________________________________________________________________________
• Cold air is ____________ _________________, sinks and exerts _____________ _____________________.
• Warm air is ___________ _________________, rises and exerts ______________ ____________________.

Air moves from _______________ pressure to ______________ pressure.

Molecules want to spread out!

Weather maps on television show us where there are areas of high and low pressure.

Low Pressure

• A ____________ _______________ system on a weather map is an area where the air pressure is
_____________ than the surrounding air and is represented by the letter ________.
• Because of this pressure difference, _____________, _____________ and ______________
___________ air is forced _______________ by the surrounding higher pressure air, swirling it
___________________________ as it rises.
• As warm moist air rises, ______________________ and __________________ form.
• Low pressure is associated with ________________ , humid and ______________________ weather.
• LOW PRESSURE = LOUSY WEATHER

High Pressure

• A ____________ _____________ system on a weather map is an area where the air pressure is
_______________ than the surrounding air and is represented by the letter _______.
• Because of this pressure difference, ______________, _____________ and ____________ _________
air flows into the lower pressure area, blowing out over a great are.
• As cool air sinks, only a ____________ sparse _______________ may be in the sky.
• High pressure is associated with ______________, dry and ____________________ weather.
• HIGH PRESSURE = HAPPY WEATHER

Isobars:

• Iso=___________________ bar= ___________________


• Isobar means _____________ _________________ .
• Isobar lines are used when _________________ _________________ readings are taken and
recorded on a map, and then the readings that ______________ are connected by a line.
• Maps showing isobars are very useful in locating areas of _____________ and ___________
pressure.

Low Pressure High Pressure


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