Desert – an ecosystem found where there is very little rainfall.  Two kinds of deserts: ...

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Transcript of Desert – an ecosystem found where there is very little rainfall.  Two kinds of deserts: ...

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  • Desert an ecosystem found where there is very little rainfall. Two kinds of deserts: Hot deserts Cold deserts Hot deserts Temperatures are very warm all year round The summers are very hot Cold deserts Short, warm summers Long, cold winters Found in places near the north and south poles
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  • Climate The desert is very dry and warm. A very little amount of rain rains a year. Some deserts can be over 100 degrees F. Thats so hot.
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  • Location The desert is located 30 degrees latitude. Many deserts form around 30 degrees latitude because this region is the subtropics. The subtropics experience high air pressure, which means clouds will not form, and because there are no clouds, there is no precipitation. Another reason you get deserts is because they are far inland and thus far from a body of water that can provide the humidity for clouds and rain.
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  • Some deserts are in the Mountains. The Mojave desert is the name of the desert that is located in California.
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  • Desert Plants Many plants are found in the desert. They usually grow close to the ground. These plants have special parts that help them save water. The special parts are: thick stem, shallow and wide roots, and thick skin covered with spines instead of leaves.
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  • The cactus, saguaro, creosote bushes, and other plants.
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  • Desert Animals There are many animals in the desert. They can survive by eating other animals or by eating plants that store water. To protect them from the hot sun, they stay in the shade or in their shelter. Animals may build their shelters inside plants. Some animals sleep during the day and are active at night. Some animals have hard shells to protect them from losing much water. More animals live in hot deserts than in cold deserts.
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  • Roadrunner Anteater Scorpion Gila monster (lizard) Camel
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  • DesertLocationSizeTopography SUBTROPICAL DESERTS Sahara Morocco, Western Sahara, Algeria, Tunisia, Libya, Egypt, Mauritania, Mali, Niger, Chad, Ethiopia, Eritrea, Somalia 3.5 million sq. mi. 70% gravel plains, sand, and dunes. Contrary to popular belief, the desert is only 30% sand. The world's largest nonpolar desert gets its name from the Arabic word Sahra', meaning desert Arabian Saudi Arabia, Kuwait, Qatar, United Arab Emirates, Oman, Yemen 1 million sq. mi. Gravel plains, rocky highlands; one-fourth is the Rub al-Khali (Empty Quarter), the world's largest expanse of unbroken sand KalahariBotswana, South Africa, Namibia 220,000 sq. mi.Sand sheets, longitudinal dunes
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  • Australian Desert Gibson Australia (southern portion of the Western Desert) 120,000 sq. mi. Sandhills, gravel, grass. These three regions of desert are collectively referred to as the Great Western Desert otherwise known as the Outback. Contains Ayers Rock, or Uluru, Great Sandy Australia (northern portion of the Western Desert) 150,000 sq. mi. Great Victoria Australia (southernmost portion of the Western Desert) 250,000 sq. mi. Simpson and Sturt Stony Australia (eastern half of the continent) 56,000 sq. mi. Simpson's straight, parallel sand dunes are the longest in the world up to 125 mi. Encompasses the Stewart Stony Desert, named for the Australian explorer
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  • Mojave U.S.: Arizona, Colorado, Nevada, Utah, California 54,000 sq. mi. Mountain chains, dry alkaline lake beds, calcium carbonate dunes Sonoran U.S.: Arizona, California; Mexico 120,000 sq. mi. Basins and plains bordered by mountain ridges; home to the Saguaro cactus Chihuahuan Mexico; southwestern U.S. 175,000 sq. mi. Shrub desert; largest in North America TharIndia, Pakistan175,000 sq. mi.Rocky sand and sand dunes
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  • Great Basin Desert California Nevada Idaho Utah
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  • Mojave Desert California Nevada Arizona Utah
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  • Chihuahuan Desert Arizona New Mexico Texas
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  • Sonoran Desert California Arizona
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  • COOL COASTAL DESERTS Namib Angola, Namibia, South Africa 13,000 sq. mi.Gravel plains AtacamaChile54,000 sq. mi.Salt basins, sand, lava; world's driest desert
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  • COLD WINTER DESERTS Great Basin U.S.: Nevada, Oregon, Utah 190,000 sq. mi. Mountain ridges, valleys, 1% sand dunes Colorado Plateau U.S.: Arizona, Colorado, New Mexico, Utah, Wyoming 130,000 sq. mi. Sedimentary rock, mesas, and plateausincludes the Grand Canyon and is also called the Painted Desert because of the spectacular colors in its rocks and canyons PatagonianArgentina260,000 sq. mi.Gravel plains, plateaus, basalt sheets
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  • Kara-Kum Uzbekistan, Turkmenistan 135,000 sq. mi. 90% gray layered sandname means black sand Kyzyl-Kum Uzbekistan, Turkmenistan, Kazakhstan 115,000 sq. mi. Sands, rock name means red sand IranianIran100,000 sq. mi.Salt, gravel, rock TaklamakanChina105,000 sq. mi. Sand, dunes, gravel GobiChina, Mongolia500,000 sq. mi.Stony, sandy soil, steppes (dry grasslands)
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  • POLAR Arctic U.S., Canada, Greenland, Iceland, Norway, Sweden, Finland, Russia 5.4 million sq. mi. Snow, glaciers, tundra AntarcticAntarctica5.5 million sq. mi.Ice, snow, bedrock
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  • Learn more about deserts http://www.jlhs.nhusd.k12.ca.us/Classes/Science/Net_Lessons/Biom es/deserts.html#anchor325870Desert information http://www.jlhs.nhusd.k12.ca.us/Classes/Science/Net_Lessons/Biom es/deserts.html#anchor325870 http://idptv.state.id.us/dialogue4kids/season3/desert/plants.html Desert information http://idptv.state.id.us/dialogue4kids/season3/desert/plants.html http://mbgnet.mobot.org/sets/desert/tplants.htmDesert plants http://mbgnet.mobot.org/sets/desert/tplants.htm http://www.brainpop.com/science/ecology/desert/index.weml?&trie d_cookie=trueDesert http://www.brainpop.com/science/ecology/desert/index.weml?&trie d_cookie=true http://www.factmonster.com/ipka/A0778851.html http://www.factmonster.com/ipka/A0778851.html