wind systems grade 8 earth science
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Wind SystemsWind Systems
Grade 8Grade 8Earth ScienceEarth Science
WindWind Movement of air from an area of high Movement of air from an area of high
pressure to an area of low pressurepressure to an area of low pressure Winds are named by their direction Winds are named by their direction
of originof origin
Wind SystemsWind Systems Series of Global Winds created by Series of Global Winds created by
Convection Currents and the Coriolis Convection Currents and the Coriolis EffectEffect
Global WindsGlobal Winds
Doldrums
DoldrumsEquator
Global Winds Caused byGlobal Winds Caused by Convection Cycles Convection Cycles
Coriolis EffectCoriolis Effect The Earth is spinning on its axis once The Earth is spinning on its axis once
every 24 hours.every 24 hours. So when the cold dense air come So when the cold dense air come
down from the convection cycle the down from the convection cycle the appear to “bend”appear to “bend”
DoldrumsDoldrums Windless zone at the equatorWindless zone at the equator
Global WindsGlobal Winds
Doldrums
DoldrumsEquator
Trade WindsTrade Winds Winds used to bring the “Trade” from Winds used to bring the “Trade” from
England to AmericaEngland to America
Global WindsGlobal Winds
Doldrums
DoldrumsEquator
Prevailing WesterliesPrevailing Westerlies Winds used when sailing back to Winds used when sailing back to
England from AmericaEngland from America Winds that are responsible for most Winds that are responsible for most
of our weatherof our weather
Global WindsGlobal Winds
Doldrums
DoldrumsEquator
Polar EasterliesPolar Easterlies Winds at the PolesWinds at the Poles
Global WindsGlobal Winds
Doldrums
DoldrumsEquator
Jet StreamsJet Streams The “Rivers of the Sky”The “Rivers of the Sky” Narrow belts of wind located in the Narrow belts of wind located in the
atmosphereatmosphere Greatly affect the movement of Air Greatly affect the movement of Air
MassesMasses
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