Introduction/The difficulty living in a desert
A desert is a very dry and arid region of land which receives 250mm precipitation or less per year. The difficulty of living in a desert is the lack of resources such as water, food and shelter. The Kalahari Desert is one of the greatest examples of this, where people strive living in the harsh and arid conditions. Another example is Las Vegas, which is a large city desert where people have changed their way of life in order to survive.
Where your communities live
Kalahari Desert is an arid region of land in southern Africa, mainly in Botswana, South Africa, and Namibia. Its area is about 310,000 km2. Annual rainfall varies greatly. The northeastern part of the Kalahari receives the most rain, up to 500 mm annually. Rainfall declines toward the southeast, where some areas receive virtually no rain. Summer daytime temperatures often reach more than 38° C. The Kalahari is covered largely by drought. Sand dunes are found in some areas. Animals such as gemsbok, wildebeest, and lions wander much of the Kalahari. A small number of people called Bushmen, nomadic hunters and gatherers inhabit the area.
Las Vegas is a large desert city in America, with a population of 586,132 people. Las Vegas lives in a very similar landscape, but is filled with casinos, shops and diners. Las Vegas enjoys plentiful sunshine year round, it has an average of about 300 sunny days per year. The summer months of June through September are very hot and mostly dry, with average daytime highs of 34 to 40 °C and night-time lows of 21–26 °C. There are an average of 133 days per year above 32 °C, and 72 days above 38 °C, with most of the days in July and August exceeding that level. Humidity is very low, often under 10%.Las Vegas' winters are of short duration and the season is generally mild, with daytime highs near 16 °C and night time lows around 4 °C. The mountains surrounding Las Vegas accumulate snow during the winter, but...