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Deserts have extreme temperatures because they have low humidity and very little vegetation. Without large bodies of water or plants to absorb and release heat, the sun's energy is able to heat the land during the day and escape into the atmosphere at night, causing drastic temperature changes.
The extreme temperatures in deserts are caused by the lack of atmospheric moisture and cloud cover. This allows for the sun's rays to directly heat the land during the day and for the heat to escape quickly at night, resulting in hot days and cold nights.
Deserts are colder at night than other regions because they have low humidity and little to no cloud cover, which allows for the heat to quickly dissipate into the atmosphere. In other regions, the humidity and cloud cover act as insulation, trapping heat and preventing it from escaping.
Animals in the desert have adapted to survive in extreme temperatures. Some animals, like camels, have thick fur to keep them warm at night and a reflective coat to keep them cool during the day. Others, like the kangaroo rat, are nocturnal and only come out at night when temperatures are cooler.
Humans can live in the extreme temperatures of deserts with proper preparation and resources. Many desert communities have developed methods to cope with the heat, such as building homes with thick walls and small windows to keep the interior cool. Additionally, humans can use technology like air conditioning and proper hydration to survive in desert environments.