SaharaStory三毛撒哈拉的故事.pptx

SaharaStoryByEcho

DontaskmewhereIcomefrom,myhomeisfaraway...--SanMao

WhatisaDesertLike?Thedesertisalandofextremes:extremeheatandextremedryness;suddenflashfloodsandcoldnights.Becausedesertsaresuchaharshenvironment,desertsoftenhavenameslikesDeathValley“,theemptyquarter“,andtheplacefromwherethereisnoreturn“.

Desertsareusuallyvery,verydry.Eventhewettestdesertsgetlessthanteninchesofprecipitationayear.HotDuringtheDay,CoolatNight

TypesofDesertsBelieveitornot,desertscomeintwovarieties:hotandcold.HotdesertsThemainformofprecipitationinahotdesertisrain.Butthatsonlyteninchesorlessofrainperyear.e.g.Kalahari(SouthwesternAfrica)Sahara(NorthernAfrica)

ColddesertsThemainformofprecipitationinacolddesertissnow--butonlyteninchesorlessperyear.

E.g.Gobi(NorthernChinaandSouthernMongolia)GreatBasin(WesternUnitedStates)

LifeindesertsDesertsarethehometomanylivingthings.Infact,desertsaresecondonlytotropicalrainforestsinthevarietyofplantandanimalspeciesthatlivethere.

camelDeathgleaner

PlantsindesertHowdoyouthinkplantsgrowinaplacethatisvery,verydry??Manyofthefascinatingfeaturesofdesertplantsareadaptations--traitsthathelptheplantsurviveinitsharshenvironment.Desertplantshavetwomainadaptations:?Abilitytocollectandstorewater?Featuresthatreducewaterloss?

thefairyindesertSaguaroCactus

Huyang

SnowontheSaharaIfyourhopesscatterlikethedustacrossyourtrackIllbethemoonthatshinesonyourpathThesunmayblindoureyesIllpraytheskiesaboveForsnowtofallontheSaharaIfthatstheonlyplacewhereyoucanleaveyourdoubtsIllholdyouupandbeyourwayoutAndifweburnawayIllpraytheskiesaboveForsnowtofallontheSahara…

Thankyou!