Words to Know Air Pressure Wind Air Pressure

Air Pressure Can also be called Atmospheric Pressure • The weight of the air

Less Dense • This is when the molecule in air are more spread out

More Dense • When the molecules are more closely packed together • It means

Altitude Height above sea level (or earths surface) • Ex: The high up a

Elevation • Height above sea level (another word we will use for altitude)

High Pressure System - When colder, more dense air mass (air) will sink (because

Low Pressure System - When warm air (less dense = lighter) rises - When

Wind • Is caused by differences in air pressure • When air moves from

Convection Cell Pattern of warm air rising and cool air sinking caused by unequal

Sea Breeze • Wind that blows from the sea toward the land • Happens

Land Breeze • Wind that blows from land toward sea • Happens at NIGHT

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Words to Know Air Pressure & Wind

Air Pressure Can also be called Atmospheric Pressure • The weight of the air above a given are on Earth’s surface • Closer to Earth’s surface the more air pressure

Density • How tightly packed matter is

Less Dense • This is when the molecule in air are more spread out • It means less air pressure

More Dense • When the molecules are more closely packed together • It means more air pressure

Altitude Height above sea level (or earths surface) • Ex: The high up a mountain the higher the altitude

Altitude

Elevation • Height above sea level (another word we will use for altitude)

High Pressure System - When colder, more dense air mass (air) will sink (because more dense = heavier) - HAPPY weather!!! - Coolers, drier, sunny, clear skies

High Pressure System

Low Pressure System - When warm air (less dense = lighter) rises - When warm air rises and cools down clouds form! - LOUSY weather!!! - Wet, warm, stormy!!

Low Pressure System

Wind • Is caused by differences in air pressure • When air moves from high pressure to low pressure (colder air wants to move to warmer air) this creates wind

Convection Cell Pattern of warm air rising and cool air sinking caused by unequal heating and cooling of earth surface

Sea Breeze • Wind that blows from the sea toward the land • Happens during the DAY time because land it warmer and cool air pushes warm air up

Sea Breeze

Land Breeze • Wind that blows from land toward sea • Happens at NIGHT because the ocean is warmer (because it takes longer to cool down) and the cool air pushed the warm air

Land Breeze