Water Pollution: Can You See It?

What You Do:

1. Using the four large jars, collect samples of water from four difference sources. Good sources to use might be tap water, bottled water, rain water, or water from creeks, ponds, rivers, or even the ocean.
2. Use a strip of masking tape and a marker to label each jar so that you will know the source of the water.
3. Fit the coffee filters just inside the mouths of the large, wide-mouthed jars. Take one of the water samples, and slowly pour the water through the filter into the other jar. Repeat this step for each water sample. Don't forget to label the filters and new jars, so they don't get mixed up.
4. Open each filter and examine it through the magnifying glass. Discuss the filters with your child. Which filter is the most discolored? Which filter caught the most particles? Did any of the samples leave a colored residue on the filter?
5. Discuss with your child how the water in rivers, streams and ponds can become polluted. Where do pollutants come from? (A major cause of water pollution is due to the chemicals and dyes that factories release into rivers. Individuals who drop litter in any water source like rivers, streams, or creeks, also contribute to water pollution.)

Extension Activity:

You can show your child that water can be polluted even if the pollution is not dramatically visible.

What You Need:

• Large, clear container
• Cup
• Red food coloring
• Water

What to Do:

1. Pour one cupful of water into the large container.
2. "Pollute” this water by adding a little red food coloring.
3. Add clear water, one cupful at a time, until the water looks clear.
4. Discuss with your child what the results of this demonstration is. Assist him in making connections between this experiment and the real world. Some questions to think about can be: Can we see the dye? Is the dye still in the water? If someone drinks from this water, will they also drink the dye? What would happen is the dye was poisonous or dangerous?