Red, Yellow, Blue

Okay, here are my thoughts. Yes, I'm supposed to be in bed but I'm still thinking about this painting idea.

Yellow = evaporation
Red = condensation
Blue = precipitation

Technically, saturation should also be included (water that is standing on the ground) but I think we'll leave it at the 3.

So the yellow is the sky, including a darker yellow for the sun. The red is the clouds. The blue is the drops of water coming from the clouds and falling to the ground. On the ground we want land and sea and mountains (with white ice caps).

Hmmm.

Then, when they write their report, they could use the color coding for the scientific terms as they explain the water cycle.