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Solar Still

Solar Still. Anna Vazquez, Umair Muhammad, Oriol Fernandez, Marc caravaca. Introduction. Did you know that water covers about 70% of the Earth? But almost all of it is in the oceans and undrinkable. Introduction. The solar still uses solar energy to purify water. Equipment.

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Solar Still

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  1. SolarStill Anna Vazquez, Umair Muhammad, Oriol Fernandez, Marc caravaca

  2. Introduction • Did you know that water covers about 70% of the Earth? • But almost all of it is in the oceans and undrinkable.

  3. Introduction • The solar still uses solar energy to purify water.

  4. Equipment Plastic Bowl Evaporating Dish Salt Cling Film A Beaker with Hot Water Food Dye Small Stone

  5. Procedure • 1st We add some food coloring and a teaspoon of salt.

  6. Procedure • 2nd We then put the cup in the middle of the bowl.

  7. Procedure • 3rd We add the hot water to the bowl until it is about one centimeter full.

  8. Procedure • 4th Then we’ll cover the bowl loosely with cling film, sealing the film to the rim of the • bowl. You can use tape or string to do this if necessary.

  9. Procedure • 5th Now we’ll take the equipment out to a sunny, level place. • 6thNext we’re going to place the stone on top of the film, in the middle above the cup. • 7th Now we’re ready to leave the still for at least an hour, the longer the better.

  10. Procedure • 8th Then we’ll check to see if there is some water in the cup. • 9th When we have some water in the cup, we’ll take the still back indoors and remove • the cling film. • 10th Then we’ll take out the cup without splashing any water into or out of the cup. • 11th Now we measure the amount of water in the cup and observe the color of the • water in it and test it for salt.

  11. Procedure • Volume collected in the evaporating dish • ÷ • Total volume • X • 100 • = • The percentage of purified water • 40 ml • ÷ • 500 ml • X • 100 • = • 8% 12th Here is how we then calculate the percentage of the water that was purified: 13th Lastly, we observe our results and see if we can explain what happened to the water.

  12. Conclusion • Now you may be wondering why it is called “purified water”. Well, what ideas do you • have? Tell me.

  13. Thanks for your attention

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