| 1. | Summarize your results. Compare your prelab predictions to your results. For those that do not agree, identify which you believe to be incorrect (your prediction or your result) and why.
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| 2. | Most 1970 pennies look tarnished, but most 1970 quarters do not. Suggest a reason.
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| 3. | Lightsticks contain a substance that breaks down during a chemical reaction. A release of energy (as light) accompanies this reaction. Therefore, the amount of light released is proportional to the number of molecules breaking down.
a) The lightsticks below are in water of different temperatures. Which one is in the warmer water?  b) What would be the effect on the intensity of a lightstick and the duration of its glow if a lightstick was placed in a freezer? |
