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Deşerturile calde
Realizare
Prof.Bodriheic Denisa Emilia
Sc.Gen.,,Enea Grapini,,
Şanţ, Bistriţa-Năsăud
Bibliografie: Viaţa sălbatică a lumii,
Ed.Aquila
www.images.google.com
 Deşerturile se suprapun zonelor cu climă
tropicală uscată, având mare extindere în:
Africa (Sahara, Kalahari,
Namib)
Asia (Arabia, India-Deş. Thar)
Australia
America de Sud (Atacama)
Sudul Americii de Nord.
 Majoritatea zonelor deşertice din lume sunt
poziţionate în apropierea ecuatorului.
 În deşerturile tropicale şi subtropicale,
temperaturile diurne sunt foarte ridicate,
ajungând până la 54 grade Celsius.
 Nopţiile sunt extrem de friguroase, cu
temperaturi sub 0 grade ( noaptea,
neexistând nicio formaţiune noroasă
deasupra deşertului, căldura solară
acumulată în timpul zilei se împrăştie foarte
rapid în atmosferă).
 Deşerturile calde se caracterizează printr-o
vegetaţie şi o faună sărace.
 Porţiuni întinse sunt practic lipsite de vegetaţie,
nisipul fiind atotstăpânitor.
 Vegetaţia existentă este formată din mici tufişuri
spinoase, din plante cu frunze tari sau din plante
suculente, cum sunt cactuşii, care se întâlnesc
numai în America.
 În Sahara, cel mai mare deşert al lumii,
în anumite locuri s-au format oazele,
adevărate insule de vegetaţie apărute
în jurul unor izvoare.
Cactuşi
 Animalele s-au adaptat, în general, la viaţa
de noapte, ziua stând ascunse în puţinele
locuri umbroase.
 Se întâlnesc şopârle, şerpi, scorpioni,
rozătoare, vulpi de deşert etc.
 În Sahara de Sud trăieşte dromaderul.
Scorpioni
Vulpe de deşert
Tarantula
Şarpele cu clopoţei

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deserturi prezentare power point pentru clasele primare

  • 1. Deşerturile calde Realizare Prof.Bodriheic Denisa Emilia Sc.Gen.,,Enea Grapini,, Şanţ, Bistriţa-Năsăud Bibliografie: Viaţa sălbatică a lumii, Ed.Aquila www.images.google.com
  • 2.  Deşerturile se suprapun zonelor cu climă tropicală uscată, având mare extindere în: Africa (Sahara, Kalahari, Namib) Asia (Arabia, India-Deş. Thar) Australia America de Sud (Atacama) Sudul Americii de Nord.
  • 3.  Majoritatea zonelor deşertice din lume sunt poziţionate în apropierea ecuatorului.  În deşerturile tropicale şi subtropicale, temperaturile diurne sunt foarte ridicate, ajungând până la 54 grade Celsius.  Nopţiile sunt extrem de friguroase, cu temperaturi sub 0 grade ( noaptea, neexistând nicio formaţiune noroasă deasupra deşertului, căldura solară acumulată în timpul zilei se împrăştie foarte rapid în atmosferă).
  • 4.  Deşerturile calde se caracterizează printr-o vegetaţie şi o faună sărace.  Porţiuni întinse sunt practic lipsite de vegetaţie, nisipul fiind atotstăpânitor.  Vegetaţia existentă este formată din mici tufişuri spinoase, din plante cu frunze tari sau din plante suculente, cum sunt cactuşii, care se întâlnesc numai în America.
  • 5.  În Sahara, cel mai mare deşert al lumii, în anumite locuri s-au format oazele, adevărate insule de vegetaţie apărute în jurul unor izvoare.
  • 6.
  • 7.
  • 9.
  • 10.
  • 11.
  • 12.  Animalele s-au adaptat, în general, la viaţa de noapte, ziua stând ascunse în puţinele locuri umbroase.  Se întâlnesc şopârle, şerpi, scorpioni, rozătoare, vulpi de deşert etc.  În Sahara de Sud trăieşte dromaderul.
  • 14.
  • 17.