Wednesday, April 2, 2008

Activity #4

Today we saw that different types of substances can change temperature by the amount of light hitting it and the substances makeup. Both the amount of light and the substances makeup changed how much energy it can absorb and release as heat.
Everything that was in a bottle without a white out top got hotter a lot quicker than the same thing with a whited out top. This is because light is a primary source of energy, and as energy is absorbed, heat is released as a bi-product.
Water was the substance that absorbed the most energy and had the highest output in heat when uncovered. Dirt came in second and road salt came third. When covered, the dirt came first, water came second and road salt third.

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