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   Although there are many different variables in how water can freeze, we chose to focus our research on the change in density of water as it freezes in a higher state of gravity.  This, however, covers a large variety of issues.  There are many components of waters density as it is being frozen in a high gravitational environment.  Water with a freezing point at one ATM of -218.8°C, pressure of 49.6 ATM, and specific gravity, liquid at 20°C, (Cliff and Stanhope, 2003) needs these physical properties to work, not including expansion of the water.  Therefore we will need to use a centrifuge that is at a temperature cold enough for water to freeze.  Another useful piece of information pointed out by Ehrenfreund, is that to fully investigate freezing water in a microgravity environment requires specific high-tech instrumentation.  Therefore we must be as exact as possible in our high gravity environment and use our limited materials to our best ability.  Through freezing water to ice we may see that ice has an unusual feature when frozen at one atmosphere.  The product after freezing is some 8% less dense than liquid water (Wikipedia 2005).  Peter Wilson also confirms that oxygen can be compressed or frozen.  So we can look for compression and see the freezing.  Therefore, we think that our results should show that by freezing the water in high gravity the ice should be denser than normal because of the compression of the molecules.  To support our hypothesis, an online free encyclopedia tells us that although liquid water becomes denser at lower temperatures and just above freezing water reaches its maximum density, the expansion of the freezing water actually makes it less dense.





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