Water Cycle Model
This is one of the water science fair projects that you can make all by yourself!
You will need the following materials:
1 large clear bowl, the Pyrex ones are the best
1 glass of water
salt
1 small round plastic container, about 3 inches high
1 clear plastic sheet
1 large rubber band
Instructions:
Put some salt into your glass of water, making sure it dissolves. Don't put too much salt! Two teaspoons should do.
Pour the saltwater into clear bowl.
Place the plastic container at the center of the bowl, make sure it doesn't float in the water. It's best if it touches the bottom and that the opening is way above the water line. If the water is too near the opening, find a taller container. The container should have no water in it.
Take the clear plastic sheet and stretch it over the top of the bowl. Secure it with a rubber band, making sure that the plastic sheet stays tight over the top of the bowl.
Leave the bowl out in the sun and watch what happens.
Concept Explanation:
Water science fair projects are usually simple, and mostly fun. When you leave this project out in the sun, the water in the bowl will evaporate. The plastic sheet will keep the water vapor within the system. When the weather cools, the water will condense and drop back down into the bowl, and into the container as well! Once you find water in the plastic container, that means that you have completed a cycle! Taste the water in the container. Why isn't it salty?
