What is the reason for occurance of desert in Australia?
970654
The formation of deserts has a lot to do with lattitude.  Most deserts are located in sub-tropical areas where high pressure is created by the circulation of air after it is heated in the tropics.  These areas have an almost perminent supply of a high pressure system that prevents a lot of precipitation and allows for extremely high temperatures.
557119
Sand in the ocean deals with water. Sand in the desert would be dealing with wind and heat. Ocean water also contains minerals/salts which may be adhering or tearing away at the sand. The only water desert sand may ever encounter is more than likely the rare rainfall- freshwater, which if anything would help "wash" away any minerals bonding to it. Wet vs. Dry- either way sand gets in places you don't want it... So just keep away from it unless you're gonna superheat the stuff and make glass.. heheh.
6130
probably some country in the sahara desert
377416
1) Iran\n2) Rabat, Morocco\n3) Sennar, Sudan\n4) Alice Springs, Australia\n5) Nevada, US\n\nThese places are semi-arid\n1) The Steppe of Kazakhstan \n2) The Sertão of Brazil
537767
Technically they do have soil. Just different kinds.\n\nSoil type is based mostly on texture & composition.\n\nSome deserts have loose sandy soil. Others have desert "pavement" which is essentially hard compacted soil.\n\nThere are 3 major types of soils under which all other subsoils fall. Pedocals are those soils found in the desert & other arid places. It is high in calcite b/c of lack of water filtering through the soil.\n\nThe other two are laterite which is found in humid tropical places that is high in iron oxide & pedalfers which are found in temperate climates. Like I said there are more but these are the main three types.
564484
Hi, Ishan,\n\nsee below some useful links. One is a news story about China's creeping deserts (BBC link); however, with climate change this is also seriously affecting E. Africa, where one can almost watch the dunes moving.
580853
Great answers - basically, lack of moisture in the air.\n\nFor some great pictures:\n\nhttp://www.coolantarctica.com/gallery/Antarctica_gallery_home.htm
834058
warm arid and tropical regions
791711
The Great American Desert.
222842
They seeem to be found in a few places Califoria, Africa , Australia
419324
The answer is C. Both of these are on the Tropic Of Cancer (Latitude). Along the equator (which is further south) hot air rises - this causes very high rainfall in some areas(hence equatorial rainforests). On the tropic lines (Cancer & Capricorn)the air starts to sink. Sinking air causes a lack of rain (hence deserts and semi arid lands in North Africa and the Middle East)\nAny mountainous areas (even in Africa and The Middle East) will be wetter than the surrounding areas due to the effect of Relief Rainfall.
645256
Most sand is composed of silicon dioxide (quartz) which is very resistant to acids and abrasion, and that is also the reason beaches have sand. Whether the erosional force is air or water, most other materials are more easily removed, leaving behind the sand. Often this process took place in the ocean, then plate tectonics (the same force that built the mountains you mentioned) or sea level fluctuations leave the sea bed exposed to become a desert. So yes, many deserts were once part of a seabed, and often marine fossils can be found in outcrops of desert bedrock.
648218
Deserts can be either HOT or COLD. Antartica is also a desert.\n\nIn geography, a desert is a landscape form or region that receives little precipitation. Generally deserts are defined as areas that receive an average annual precipitation of less than 250 mm (10 inches).\n\nDeserts have a reputation for supporting very little life. Compared to wetter regions this may be true, although deserts often have high biodiversity, including animals that remain hidden (especially during the daylight) to preserve moisture. About one-fifth of Earth's land surface is desert.\n\nDesert landscapes have certain features. Deserts are often composed of sand and rocky surfaces. Sand dunes called ergs and stony or hamada surfaces compose a minority of desert surfaces. Exposures of rocky terrain are typical, and reflect minimal soil development and sparseness of vegetation. Bottom lands may be salt-covered flats. Eolian (wind-driven) processes are major factors in shaping desert landscapes. Cold deserts have similar features but the main form of precipation is snow rather than rain. The largest cold desert is Antarctica (composed of about 98 percent thick continental ice sheet and 2 percent barren rock). The largest hot desert is the Sahara.
78076
Some of the biggest problems facing the desert are habitat destruction, damage from excessive use and pollution.  As technology gets better, people are better able to have a comfortable life in the desert thus opening areas that have not previously been seen as valuable living space.  Despite appearing to be mostly dead, deserts are actually fragile ecosystems and something as simple as footsteps can cause damage that can take years to reverse. There are areas of the Mojave desert where the desert is still scarred from tank training in World War II.  Since deserts were seen as dead places in the past, they have long been used as a dumping ground for toxins which are now seeping into the environment.
547207
Deserts are generally located in two broad belts either side of the equator. That is because the surface air rises at the equator due to the higher temperatures. As the equatorial air rises it cools and the water condenses out and fall as rain. The cold air then falls back to the surface in those two sub-equatorial belts. The air at this stage is depleted of all moisture, and because the air is falling it creates a high pressure system that prevents rain producing weather systems from developing.\n\nThat is a fairly simplistic summary of some complex weather systems, but it suffices to explain why deserts are located where they are.
132721
Adverse climate changes has caused the area to undergo a rapid desertification whereby in the past the area was one of the most fertile lands supporting ancient civilizations. Now it is mostly barren and intensive cultivation and deforestation has caused infertile conditions and rapid creeping of deserts into fertile lands. Thus very little life can be supported there and drought conditions is evident most of the year, only very hardy desert animals and plants can withstand conditions there. The area is also one of the least populated areas in the world.
1115854
The weight of the air pressing down on the Earth, the ocean and on the air below causes air pressure. Earth's gravity, of course, causes the downward force that we know as "weight." Since the pressure depends upon the amount of air above the point where you're measuring the pressure, the pressure decreases as you go higher.\n\nso im guessing he talked about how in mountains, atmospheric pressure is low and high in deserts with regards to elevation. as air goes down/descends, it warms and cools as it goes up. \n\nhttp://www.usatoday.com/weather/tg/whighlow/whighlow.htm\n\nyes. froggie is right. the phenomenon is called rainshadow effect. \n\nnow i dont really know what your question is, but just a trivia. notice that on one side of tall mountain, it is high in plant life while the other is mainly desert? this is because the mountain blocks the moving air and forces it to precipitate thus causing rain which in turn supports lots of plants which support the animals.  now since the water molecules in the air was already precipitated/ let go on the one side, there is nothing left for the other side of the mountain thus the formation of deserts. so instead of formation of rain, the air starts to gather water molecules from its surroundings, depriving the plants of necessary moisture thus no plant life can be observed in most deserts. \n\nhope that helps.