Evaporation is one of the most common natural phenomena that young children notice ("The puddle is gone!") but rarely understand. A simple evaporation experiment gives children concrete data: paint water marks on different surfaces, observe them disappearing at different rates, and ask why. Does sun speed it up? Shade slow it down? Wind make a difference? These are testable questions with clear, observable answers — exactly what early science inquiry should be.

Experiments to Try

• Sun vs. shade: Wet two identical paper towels equally; place one in sun, one in shade. Which dries first?
• Puddle watch: After rain, draw chalk circles around several puddles of different sizes. Return every hour and trace the new puddle edges. Record on a chart.
• Water painting: Paint water designs on the sidewalk; time how long they take to disappear on a sunny vs. cloudy day.
• Wind effect: Wet two paper towels equally; fan one with a piece of cardboard. Does the fanned one dry faster?
• Covered vs. uncovered: Place equal water in two bowls; cover one tightly with plastic wrap. Which loses water faster?

Frequently Asked Questions

Where does evaporated water go?

When water evaporates, individual water molecules absorb enough energy (from heat) to escape the liquid and enter the air as invisible water vapor. The water hasn't disappeared — it's now in the air as gas. When enough water vapor accumulates at altitude and temperature drops, it condenses back into liquid droplets, forming clouds. Those clouds eventually produce rain or snow — returning the water to the ground. This is the water cycle, and evaporation is its critical first step.

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