March 13

Evaporation

The word of the day was evaporation. Where do puddles go after it rains? I explained that water rises into the air in a process called evaporation. We can’t see the water vapor in the air because it is a gas. We looked at pictures and animations of the water cycle. Click here to watch a video about the water cycle. We are referring to water vapor, when we say that it is humid.

Then my kindergarten scientists moved outside to “paint” with water. We used four tools: a syringe, baster, spray bottle, and paintbrush. These are great tools to strengthen developing finger muscles. We experienced how air pulls the water inside the syringe and baster. When we pushed the sprayed bottle, the mist disappeared immediately. Where did it go?

As the water evaporated, our art disappeared. Did the water evaporate faster in the shade or in the sun? One scientist asked if we were painting with colored water because the sidewalk appeared darker. Another asked that if we covered a water spot with a bucket, could we stop evaporation? And then several children squirted water into the groove between the sidewalk squares, and watched how it traveled in the track. What a blessing to watch their joy as they made discoveries!

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