The important thing to remember is that deserts are dry. Deserts can be found in tropical regions where there is little rainfall. Other deserts can form where mountains receive most of the rain. This is called the rain shadow. The great Gobi Desert of Mongolia has little rainfall because the Himalaya Mountains to the south prevent rainfall from moving to this region.
All deserts have great temperature variation.
It is warmer during the day because the sun shines on a place with little shade. They are hard on people. Deserts are also hard on plants. Desert vegetation must be adapted to these extreme conditions. Most of the vegetation in a desert is short grasses, sagebrush, creosote bush, and cactus.