Video narration
Where does a puddle go when it dries, and how does rain come back? Your puddle hasn't vanished. It has changed form and kept moving. Sunlight warms some of its liquid water, turning it into invisible water vapor that rises into the air. That's evaporation: liquid water becoming vapor. As the vapor rises, it meets cooler air and turns into tiny liquid drops. That's condensation, and the drops gather to form clouds. Inside a cloud, drops join and grow, or ice forms. When they're large enough, they fall as rain or snow: precipitation. The water lands, often far away, and flows downhill into streams, rivers, lakes, or oceans. There it gathers, ready to move through the water cycle again. So where did your puddle go? Some became vapor, formed clouds, then fell as rain or snow somewhere else.