Wind!

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WindWind

Caused by the Caused by the sunsun..

Air near the ground is Air near the ground is heatedheated. .

WarmWarm air is air is less denseless dense and and risesrises up. up.

ColdCold air air rushesrushes in ( in (windwind) to ) to taketake its its placeplace..

Global Wind Patterns (Pg. 155-156)

Areas closest to the equator are warmest because they receive the most direct sunlight.

Differences in air temperature cause wind currents (Convection Cycles)

Warm air from the equator moves toward the Earth’s poles; Cool air at the poles moves toward the equator.

Global Wind PatternsGlobal Wind Patterns

Global Wind PatternsGlobal Wind Patterns

Local Wind Patterns (pg. 157)

LandLand heats up heats up quicklyquickly and and coolscools down down quicklyquickly..

WaterWater heats up and cools down heats up and cools down slowlyslowly..

DaytimeDaytime: : AirAir over warm over warm landland heats heats upup and and is is replacedreplaced by cool by cool ocean breezesocean breezes..

NighttimeNighttime: : AirAir over warm over warm water riseswater rises up up and is and is replacedreplaced by cool by cool breezesbreezes from the from the landland..

Local Wind Patterns Local Wind Patterns (Day)(Day)

Local Wind Patterns Local Wind Patterns (Night)(Night)

The The WaterWater Cycle Cycle EvaporationEvaporation: Water is : Water is heatedheated and changes and changes

from from liquidliquid to to gasgas (water vapor) (water vapor) RiversRivers, Lakes, , Lakes, OceansOceans, Puddles, , Puddles, PlantsPlants

CondensationCondensation: Water : Water coolscools and forms back and forms back into into liquidliquid.. Clouds, Clouds, FogFog, Dew, Dew

PrecipitationPrecipitation: Water is too : Water is too heavyheavy to to remain in the air and remain in the air and fallsfalls back to Earth back to Earth Rain, Rain, SnowSnow, Sleet, , Sleet, HailHail

Water CycleWater Cycle

The Water CycleThe Water Cycle

Earth’s Earth’s TiltTilt=The Reason for =The Reason for SeasonsSeasons

During During summersummer, the Earth is tilted , the Earth is tilted towardtoward the the sunsun and receives and receives more direct more direct sunlightsunlight..

During During winterwinter, the Earth is tilted , the Earth is tilted awayaway from from the the sunsun and receives and receives less direct sunlightless direct sunlight..

During During springspring and and fallfall, the Earth is , the Earth is not not tiltedtilted toward or away from the toward or away from the sunsun..

SummerSummer in the in the northernnorthern hemisphere is hemisphere is winterwinter in the in the southernsouthern hemisphere, and hemisphere, and vice-versavice-versa..

Climate—Year RoundClimate—Year Round((NOT WeatherNOT Weather, which is , which is dailydaily))

Latitude—FurtherLatitude—Further from the from the equator=colderequator=colder climateclimate ((Less Direct SunlightLess Direct Sunlight))

AltitudeAltitude—Higher above —Higher above seasea level = level = coldercolder climate climate ((LessLess things to things to absorbabsorb sunlight) sunlight)

Oceans—CoolerOceans—Cooler Summers and Summers and WarmerWarmer Winters Winters (Because water takes (Because water takes longerlonger to to heatheat up and up and coolcool down.) down.)