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Environmental technology Experiments

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Choose the time of day when you will leave out the sponge. 12. For the other 20 hours, keep the “desert animal” sponge protected from drying out. You may not put the sponge in a closed container, as a real animal would die from lack of oxygen. , by putting the “desert animal” in a hole in the ground. 13. After 24 hours, reweigh the control sponge. 14. Record the results on the data table. 15. Reweigh the other sponge. 16. Record the results on the data table. © Infobase Publishing Published by Infobase Publishing All electronic storage, reproduction, or transmittal is copyright protected by the publisher.

Accessed September 25, 2010. Gives information about the uses of solar stills, how they work, and background history. Stikkerd, A. Water: The Blood of the Earth—Exploring Sustainable Water Management for the New Millennium. New York: Cosimo Books, 2007. Tackles the problem of finding or creating enough potable water for the world in the future. United States Army. Water Desalination. Honolulu: University Press of the Pacific, 2005. A technical manual for processes that produce drinking water from sea water.

There should be fresh water inside the glass. 17. Stick the ends of both foil-covered craft sticks into the glass of water, holding the sticks so that the tips in the water are about 1 in. apart from each other. © Infobase Publishing Published by Infobase Publishing All electronic storage, reproduction, or transmittal is copyright protected by the publisher. 5. Solar Still 27 18. Observe if the buzzer makes a sound. 19. Remove the sticks from the glass. 20. Repeat steps 17 and 18 with the salt water in the large bowl.

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