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Cryogenic Roses
MATERIALS NEEDED:
1. 5 rose buds (just beginning to open).
2. 4 plastic 1 lb. margarine bowls
3. Freezer
4. Water
If you've watched the Discovery Channel, you've probably seen the show where the frozen Russian wooly mammoth was being thawed by scientists. Not only was it thawed, but a piece was cooked and eaten. Yes, it remained edible. This project can be used in this respect, but you use pieces of hot dog instead of wooly mammoth. You can make ice castings of organic materials including pine cones and needles, and leaves. You may choose to research the shelf life for frozen meats: what affects the shelf life, light or temperature? For a basic cryogenic project, use the rosebuds. Cryogenics: the study of low temperatures on objects and processes. You can offer suppositions as to decomposition rates of frozen and non-frozen rosebuds, or if the amount of time that the rosebuds are frozen make a difference. Will your rosebuds fair as well as the wooly mammoth?
Fill the 4 plastic bowls with equal amounts of water. Make sure to find 5 equally sized rosebuds just beginning to open. Is there a fragrance? Submerge one bud in each bowl and place in a freezer. The 5th bud is to be used as a control specimen at room temperature. After the first week, take one bud and let it thaw at room temperature. Observe and record your findings with a chart documenting your findings: how does it look, smell, feel. After another week, do the same with another bud, and continue until all buds have been documented using the control specimen as a guideline.
Source:
1. Bonnet, Robert L. and G. Daniel Keen. Earth Science: 49 Science Fair Projects. Tab Books: Blue Ridge Summit, PA. 1990
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