Demonstrate how water runs down a mountain and takes things with it.
The shape of the land and the pull of gravity both influence how water moves over Earth. Rainwater and snowmelt pick up and carry water is on the land- such as trash and debris on streets, exposed soil from landslides or construction, or pollution from mines or farms- to the nearest body of water. What happens upstream always influences the water quality and processes downstream.
Plain printer paper
Washable markers (one or two colors)
Eye dropper
water
Crumple up a piece of paper and gently open it most of the way
It should still show ridges (high points) and valleys (low points)
Choose one of the ridges and color the whole ridge line with a washable marker (use LOTS of ink!)
EXTRA: Use a second color on one of the ridges and color in a dark spot. This will represent a factory or mine that often causes issues with pollution
Place the paper on a plate or towel to catch any extra water
Make a prediction: if water fell on the ridge, where do you think it will go? What will happen to the colored ink?
Now test your prediction. Using a dropper, carefully drop “rain” on the ridge
Ask yourself these questions:
Was your prediction correct?
Were you surprised by anything?
What does this tell us about how to protect our water supply?