Why are polar regions cold?
Show answer & explanation
Answer: Sunlight hits at low angle
Farthest from equator — Wrong. Distance from equator matters because of sun angle, not distance itself. Poles are cold because low-angle sunlight spreads over large areas.
Thin atmosphere there — Wrong. Atmosphere thickness doesn't significantly vary. Polar cold comes from low sun angles spreading solar energy over large areas.
Sunlight hits at low angle ✓ — Correct! At poles, sunlight arrives at very low angles (slanted rays), spreading the same solar energy over much larger surface areas than at the equator. This means less energy per square meter. Plus, sunlight travels through more atmosphere, losing energy. During winter, 24-hour darkness adds to extreme cold!