The water cycle is an amazing process and we touched on it when discussing evaporation a couple of weeks ago.
Today we are going to have a go at creating our very own mini water cycle model.
It shows how evaporation occurs, where condensation occurs and precipitation (rain). It is so simple and very clever.
As a reminder of the water cycle I have included a diagram for you that you can print out, label and colour if you wish.
The arrow from the se to the sun – evaporation
The arrow from the sun to the clouds – condensation
The arrow from the Clouds to the mountains – precipitation
Make a water cycle model
A plastic bowl (mixing bowl size)
How to make a water cycle model
It is best to do this outside in a sunny place.
1. Place the mug in the bottom of the bowl
2. Add water around the mug so that it come up to 2/3rd of the mug – if you can draw on the bowl mark where the water level is.
3. Cover the bowl tightly in clingfilm and fasten in place with the string.
4. Watch what happens!
How does the water cycle model work?
You should find that you can see condensation drops of water on the top of the cling film and that the water level have lowered proving that evaporation has taken place. The condensation droplets are the clouds. They will be dripping back into the bowl but you should find that some of the water is now in the cup (your mountains) demonstrating precipitation!