Explain how the sun's uneven heating of Earth's surface creates convection currents in the air, from a local sea breeze to global wind belts.
The sun does not heat Earth evenly. Sunlight hits the equator almost straight on, concentrating its energy, while it hits the poles at a low angle, spreading the same energy over a much larger area. That mismatch, more heat at the equator, less at the poles, sets the entire atmosphere in motion, because warm air rises and cool air sinks in a circulating pattern called convection.
You can feel a small version of this at the beach on a summer day. Land heats up faster than water in direct sunlight, so by afternoon the air over the land is warmer and rises, and cooler air from over the water rushes in underneath to replace it, a sea breeze. At night, land cools faster than water, and the pattern reverses into a land breeze. The same uneven-heating idea, scaled up to the whole planet, drives global wind belts that carry warm air from the equator toward the poles and cool air back again.
Mastery looks like: They can explain wind as air moving from cooler, sinking areas to warmer, rising areas, and can describe both a sea breeze and the global pattern using that same idea.
Common stumbles: Thinking wind is just "moving air" without connecting it to temperature differences and rising or sinking; mixing up the direction of a sea breeze versus a land breeze.