The Indian Desert: The Indian Desert Slide 2: INDIAN DESERT A place that receives less than 10 inches (25 centimeters) of rain per year is considered a desert. Deserts cover more than one fifth of the Earth's land, and they are found on every continent. Deserts are. part of a wider classification of regions called "dry lands . These areas exist under a moisture deficit, which means they can frequently lose more moisture through evaporation than they receive from annual precipitation. Slide 3: PHOTOS OF INDIAN DESERT Slide 4: THERE ARE TWO TYPES OF INDIAN DESERT 1.HOT DESERT 2.COOL DESERT Slide 5: HOT DESERT The largest hot desert in the world, northern Africa's Sahara, reaches temperatures of up to 122 degrees Fahrenheit (50 degrees Celsius) during the day. covering 9 million square kilometers and 12 countries. Hot deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures, and low nighttime temperatures (due to extremely low humidity ). In hot deserts the temperature in the daytime can reach 45 °C/113 °F or higher in the summer, and dip to 0 °C/32 °F or lower at nighttime in the winter. Urban areas in deserts lack large (more than 14 °C/25 °F) daily temperature variations, partially due to the urban heat island effect. Many deserts are formed by rain shadows ; mountains blocking the path of precipitation to the desert (on the lee side of the mountain). Slide 7: COOL DESERT The common conceptions of deserts as dry and hot, there are cold deserts as well. Desert animals have adapted ways to help them keep cool and use less water. FOR EXAMPLE,camel can go for days without food and water. Many desert animals are nocturnal, coming out only when the brutal sun has descended to hunt. Some animals, like the desert tortoise in the southwestern United States, spend much of their time underground. Most desert birds are nomadic, crisscrossing the skies in search of food. Because of their very special adaptations, desert animals are extremely vulnerable to introduced predators and changes to their habitat.