Why is the equator always warm?
Show answer & explanation
Answer: Sun directly overhead year-round
Sun directly overhead year-round ✓ — Correct! The equator receives direct (near-90°) sunlight year-round. Solar rays hit perpendicular to Earth's surface, concentrating energy per square meter. At poles, sunlight arrives at low angles, spreading over larger areas—less intense. Earth's tilt gives temperate zones seasons, but the equator always gets direct sun. Maximum solar concentration = perpetual warmth!
Closer to the sun — Wrong. The equator isn't closer to the sun (Earth-sun distance varies minimally). It's warm because it receives direct overhead sunlight concentrating solar energy.
Ocean currents bring heat — Wrong. Ocean currents do distribute heat, but the equator is warm mainly because it receives direct overhead sunlight year-round.