1. the sun’s rays warm the earth
2. the earth radiates heat which warms the air
3. cool air is warmed and becomes less dense
4. air, which is less dense, rises
5. air rising in the atmosphere expands causing lower air pressure
6. air that expands decreases in temperature
7. air is cooled until water vapor condenses into solid particles in the air
8. tiny cloud droplets collect together to form raindrops large enough to fall towards the earth