Science
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Frozen Salt Frozen Salt http: //need.org/needpdf/SecFrozenSalt.pdf
Geothermal Power Plant Make a model of a power plant that uses steam. http: //energyquest.ca.gov/projects/geothermal-...
Greenhouse Effect Why does it get really hot inside a car parked in the sun? It's the greenhouse effect. http: //energyquest.ca.gov/projects/greenhouse....
Civilizations
