 30° North or South latitude  Inland areas separated from oceanic moisture by mountain ranges  Gobi Desert of Mongolia (the Himalayas)  Great Basin of the southwestern US (The Sierra Nevada)

 Precipitation is low, less than 100 cm per year  Average annual temperature is less than 10° C  Sparse plant life, and consists of mountains, rock, and sand  Vegetation is sparse  Pronounced drought season  Short humid season

 Karakum Desert  Takla Makan  Gobi Desert  Ordos Desert  Sonoran  West through Iran and Afghanistan to the Himalayas in the east  Theodore Roosevelt National Park, North Dakota

 Baja California  Central Mexico  Southern Argentina  Southwest Africa  Coastal Chile  Coastal Peru  Arabia  Iran  Pakistan  Western India Tropical deserts are located in:

 “Arid” climate  Average annual temperature over 64.4 o F  Daytime temperatures can reach 120 o F  Precipitation is rare

 Gazelles  Coyotes  Rattlesnakes  Gerbils  Jack rabbits  Armadillo  Prickly Pear  Yellow Palo Verde  Saguaro Cactus  Prickly Pear  Yellow Palo Verde  Saguaro Cactus  Fishhook Cactus  Trichomes

 Sand Dunes  Sahara Desert  Death Valley  Negev Desert

 Iron  Copper  Salt  Gold  Silver  Uranium

 Prickly Pear  Saguaro Cactus  Fishhook Cactus  Dromedary Camel  Rock hyrax  Zebratail Lizard  Rock  Sand  Shrub

 Warmer surrounding temperatures  Development of "urban heat- islands”  percent increase in rainfall  Expansion of deserts (desertification)

 A nocturnal lifestyle-keeps them out of the heat  Living in burrows-which are cooler and more humid  Slender bodies with long limbs - better for shedding heat  Eyes protected from the sun  Adaptations for reducing water loss - specialized snouts, waxy body coatings, efficient kidneys

 Biggest threat to a desert is development  Allergies to airborne pollens  Mining  Off-road vehicle use  Global warming  Salinization of the soil