Examples of clean and dirty water for kids to see.

📚 Quick Study Guide

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• Clean Water: Water that is safe for drinking, cooking, and cleaning. It should be clear, odorless, and free from harmful chemicals and bacteria.
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• Dirty Water: Water that contains pollutants like bacteria, chemicals, and trash, making it unsafe for consumption and other uses.
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• Indicators of Clean Water: Clarity (you can see through it), lack of odor, and tested to be free of contaminants.
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• Indicators of Dirty Water: Murky appearance, unpleasant odor, presence of visible debris, and potential presence of harmful microorganisms.
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• Importance of Clean Water: Essential for human health, agriculture, and maintaining ecosystems. Access to clean water is a global issue.
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• Common Pollutants: Bacteria (e.g., E. coli), viruses, pesticides, heavy metals (e.g., lead, mercury), and plastic waste.
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• Water Purification: Methods to clean water include boiling, filtration, and chemical treatment (e.g., chlorination).

🧪 Practice Quiz

1. Which of the following is a characteristic of clean water?
   1. A. Murky appearance
   2. B. Unpleasant odor
   3. C. Clear and odorless
   4. D. Presence of visible debris
2. What is the primary concern with dirty water?
   1. A. It's too cold
   2. B. It might contain harmful substances
   3. C. It's too clear
   4. D. It evaporates quickly
3. Which of these is NOT a common pollutant found in dirty water?
   1. A. Bacteria
   2. B. Viruses
   3. C. Oxygen
   4. D. Pesticides
4. Why is access to clean water important?
   1. A. It's only needed for washing cars.
   2. B. It's essential for human health and ecosystems.
   3. C. It makes plants grow faster.
   4. D. It is required to cool electronics.
5. Which of the following is a method to purify water?
   1. A. Freezing
   2. B. Boiling
   3. C. Adding sugar
   4. D. Stirring
6. What does it mean if water is described as 'murky'?
   1. A. It is very clean.
   2. B. It is crystal clear.
   3. C. It is cloudy or not clear.
   4. D. It is very hot.
7. Which of the following indicates water is likely dirty?
   1. A. It has no smell.
   2. B. It tastes sweet.
   3. C. It has an unpleasant odor.
   4. D. It is ice cold.