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1. Describe the luster and shape of each of the two colors of crystals. (4 points)
2. Why are the crystals that stayed in the refrigerator for 12 hours a different size than the ones that stayed in the refrigerator for 24 hours? (3 points)
3. Predict what would happen if you let the crystals grow for a week. How would their color, luster, shape, and size compare with those of the crystals that were grown for 24 hours? (4 points)
4. Suppose you have two samples of halite, a mineral that forms when seawater evaporates. The first sample is a crystal that is 3 cm long. The second sample is a crystal that is 1 cm long. Based on your investigation, what might have happened for these two samples to have different sizes? (4 points)