Drinkable Water

Objective: Students will learn to recycle water so it is drinkable.

Materials: Lemonade (simulated polluted water)
2 empty clear coke bottles
packing tape

5 E Model:
Engage: Grab students' attention with a silly scenario. "Water has become so poluted by a chemical spill that it is undrinkable."
Explore: Ask students to solve problem. "How can you remove the polution?"
Explain: Give Students a possible solution as an experiment. "Use the water cycle in a bottle to filter the water."
1. Fill half a bottle with lemonade.
2. Tape empty bottle to it at tops sealing tightly.
3. Place lemonade bottle in direct sunlight and cover empty bottle with newspaper.
4. Check bottles one hour later.
Evaluate: Have students explain. "What happened?" The sun boiled the water and made it evaporate. Water vapor condensed in the cool part of the bottle. Precipitation fell and accumulated in the cool bottle. Sugar and food coloring left in hot bottle.
Expand: Have students come up with applications or furhter ways to clean water. Example- Use to make fresh water at sea, use to filter water in underdeveloped nations, use in dessert to filter urine and drink water. Boil clean water to kill germs. Filter water with rock.