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POLLUTION
Human Impacts on Our Environment
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Grades K-3: Water Quality
Students will learn how water can be purified.
Materials: newspaper, 2-liter soft drink bottles, scissors, tape, filtering materials: cotton, sand, gravel, paper towels, wire, screening, coffee filters; muddy water, plastic cups, rubber bands, crayons or markers and paper.
Vocabulary: water treatment plant, purification, pollution
Procedures:
- Discuss how does water become unsafe to drink and harmful to fish and other aquatic animals? Explain the process of how water is cleaned for drinking water.
- Cover table tops with newspaper.
- Organize students into pairs. Each pair gets a 2-liter bottle cut in half
- Instruct the students to create a funnel by placing the top of the bottle upside down and rest it in the bottom half of the bottle.
- Have groups try two different filtering methods. Pour off water in between tests.
Conclusions: Students should answer questions: Does the water look clear after it was filtered? What was left on the filter? Which filter method worked better? How can you improve your filter?
Time: one class period
Followup: Discuss the water cycles and how water can become polluted.
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