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Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
Desert notes  Notes on world's deserts & organisms' adaptations to surviving them, with video links.
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Desert notes Notes on world's deserts & organisms' adaptations to surviving them, with video links.

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Notes on world's deserts & organisms' adaptations to surviving them, with video links.

Notes on world's deserts & organisms' adaptations to surviving them, with video links.

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  • 1. Deserts PPt. by, Robin D. Seamon
  • 2. <ul><li>Dry/ arid lands (no humidity) </li></ul><ul><li>Less than 10 inches of rain a year. </li></ul><ul><li>1/5 Earth’s land surface </li></ul><ul><li>Sand & gravel </li></ul><ul><li>Supports little plant life because not enough moisture; soil is too dry </li></ul><ul><li>A land of EXTREMES </li></ul>
  • 3. <ul><li>TWO KINDS OF DESERTS: </li></ul><ul><li>Hot desert </li></ul><ul><li>Near equator, HOT days, COLD nights </li></ul><ul><li>(136 degrees F in day, 40 degrees F at night) </li></ul><ul><li>Cold desert </li></ul><ul><li>Arctic deserts where nothing can grow due to cold and dryness </li></ul><ul><li>Near the Poles </li></ul>
  • 4. HOT DESERTS http://vistawallpapers.files.wordpress.com/2007/03/vista-wallpaper-desert-landscape.jpg http://farm1.static.flickr.com/140/343920462_4376ff7d60.jpg
  • 5. COLD DESERTS Pictures http://sciences.unlv.edu/desertsurvivors/images/generalimages/antarctic1.jpg http://www.uen.org/utahlink/activities/loadimg.cgi?p=/uploads/3794_a_antarc.jpg
  • 6.  
  • 7. <ul><li>ADAPTATIONS </li></ul><ul><li>PEOPLE: </li></ul><ul><li>Farming in river valleys; wells, oasis </li></ul><ul><li>Cities: bring water in through pipelines (Las Vegas) </li></ul><ul><li>N. American villages make adobe/mud houses </li></ul><ul><li>Africa/Asia: herders live in tents/long robes </li></ul><ul><li>1 How to survive a DESERT (Man vs. Wild) directions </li></ul><ul><li>2 How to survive a DESERT (Man vs. Wild) hydration </li></ul><ul><li>3 How to survive a DESERT (Man vs. Wild) water (not saved) </li></ul>
  • 8. <ul><li>ADAPTATIONS </li></ul><ul><li>PLANTS: </li></ul><ul><li>After rains, desert flowers </li></ul><ul><li>Deep roots OR long, broad roots to take in more water </li></ul><ul><li>Store water (Saguaro) </li></ul><ul><li>Waxy leaves & stems </li></ul><ul><li>No leaves </li></ul><ul><li>Spikes for protection </li></ul>
  • 9. <ul><li>ADAPTATIONS </li></ul><ul><li>ANIMALS: </li></ul><ul><li>(insects, spiders, reptiles, birds, mammals) </li></ul><ul><li>Nocturnal : out at night when cooler </li></ul><ul><li>Burrows underground where cooler </li></ul><ul><li>Dormant during the day </li></ul><ul><li>Keeping cool tricks: RABBIT keeps cool by big ears like air conditioning </li></ul>
  • 10. <ul><li>WEATHER: </li></ul><ul><li>Rain-shadow effect: makes deserts on one side of a mountain. </li></ul><ul><li>warm air rises up the mountain and cools. As it cools, it rains down. The dry cool air sinks as the air mass moves over the other side of the mountain: </li></ul>
  • 11. <ul><li>FACTS: </li></ul><ul><li>Sahara (AFRICA)- largest desert (3.5million square miles= the size of the US) </li></ul><ul><li>Atacama (S. AMERICA)- driest, no rain for over 200 years. </li></ul><ul><li>Mojave & Sonora (USA) </li></ul><ul><li>Gobi - cold winters </li></ul><ul><li>Sahel - (AFRICA) </li></ul><ul><li>Kalihari - </li></ul>
  • 12.  
  • 13. <ul><li>VOCABULARY: </li></ul><ul><li>mirage: heat and thirst make you see things that aren’t there </li></ul><ul><li>oasis: water holes in the desert </li></ul><ul><li>arroyo: dry stream beds </li></ul><ul><li>mesa: water erosion leaves these flat hills </li></ul><ul><li>buttes: small mesas </li></ul><ul><li>dunes: piles of sand made by the wind </li></ul><ul><li>arid: dry </li></ul><ul><li>sand seas: vast regions covered by sand </li></ul>
  • 14. <ul><li>Changing Deserts </li></ul><ul><li>Desertification: making deserts </li></ul><ul><li>Near equator, air moving over land; at 15-35 degrees latitude, air has already lost its moisture & is now dry & hot </li></ul><ul><li>Separated from ocean by mountains </li></ul><ul><li>Cold ocean wind blowing on land </li></ul><ul><li>Change in climate </li></ul><ul><li>Erosion: overgrazing & deforestation </li></ul><ul><li>Reclaiming deserts: irrigating them </li></ul>
  • 15. Desert Debate: Should deserts be reclaimed? Yes, because… No, because…
  • 16. Saguaro Cactus
  • 17.  
  • 18.  
  • 19.  
  • 20. DESERT

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