|
|
Cleaning Dirty Water!
Have you ever wondered how water gets cleaned?
How does the City take water from the river and clean it?
To find out, try this activity:
-
Take two large plastic cups.
-
In one, punch a small hole in the center.
-
Take a small aluminum pie pan and make a small hole in its center. Align the holes, placing the cup on the top of the pie pan.
-
Place the second cup on the bottom of the two, so that the hole will drain into the cup.
-
In the top of the cup, fill 1 inch with large gravel.
-
Then pour in one inch of small gravel.
-
Next, pour 3/4 of an inch of sand, pour 1/3 inch of charcoal dust (ACTIVATED CHARCOAL -ASK FOR ADULT HELP).
-
Then place a thin layer of cotton over the charcoal.
-
This is your filter.
-
In another cup, mix dirt with water.
-
Pour dirty water into the filter.
- What comes out of the bottom?
- Is the water clean or dirty?
- Why did it happen?
- Where is the dirt?