Deserts

A desert is a landscape or region of land that is very dry because of low rainfall amounts (precipitation), often has little coverage by plants, and in which streams dry up.

Deserts can also be described as areas where more water is lost by evapotranspiration than falls as precipitation. Desert plants must have special adaptations to survive with this little water.

Deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures, and low nighttime temperatures. The humidity may be as low as 2 to 5% and because water vapour in the atmosphere acts to trap long wave infrared radiation from the ground, the cloudless desert sky is incapable of blocking sunlight during the day or trapping during the night.

 Thus, during daylight, most of the sun's heat reaches the ground, and as soon as the sun sets the desert cools quickly by radiating its heat into space. In hot deserts, the temperature in the daytime can exceed 45 °C (113 °F) in the summer and dip to below freezing point at night during the winter.

Some major deserts are Arctic desert,Sahara,Arabian,Patagonian,Kalahari

 & Thar deserts.

Cactus is found in desert that retains moisture even in high heat & some specefic animals like camel,rats,foxes,coyotes,jackals,snake,birds & rabbit can be found.