Which climate receives less than 10 inches of rain per year and has extreme temperatures with hot days and cold nights?

• A. Desert
• B. Oasis
• C. Savannah
• D. Tropical Rainforest

Answer: (A)

Arid climates have very low rainfall and can show large temperature swings between day and night. When a region receives fewer than about 10 inches of rain each year, it fits the desert category. The hot days and cold nights described are classic desert conditions, caused by dry air that heats up quickly in the sun and loses heat quickly after sunset. The other options don’t match this climate pattern: an oasis isn’t a climate, just a water source found in deserts; savannah has more rainfall with a seasonal wet period; tropical rainforest receives heavy rain year-round. So, desert is the best fit for the description.