AP BIOLOGY

Detailed explanation-1: -The temperature in the desert can change drastically from day to night because the air is so dry that heat escapes rapidly at night. The daytime temperature averages 38°C while in some deserts it can get down to-4°C at night.

Detailed explanation-2: -Heat and humidity During the day, sand’s radiation of the sun’s energy superheats the air and causes temperatures to soar. But, at night most of the heat in the sand quickly radiates into the air and there is no sunlight to reheat it, leaving the sand and its surroundings colder than before.

Detailed explanation-3: -They are characterized by a distinct seasonal climate, with strong, long-lasting frost in winter and extremely hot summer, in combination with very low annual precipitation of less than 100 mm. The temperature of the cold winter deserts and semi-deserts fluctuates between-45°C and +50°C.

Detailed explanation-4: -Deserts are basically regions characterised by three main features-low rainfall, scanty vegetation and extreme temperatures.