There are three phases of matter, these include liquid, solid, and gases. Solids' molecules are the most dense. Then liquid is less dense. Gas is the least dense and its molecules are very far apart. Generally when solids are heated they turn into liquid and eventually gas. An example of this is what we did in class. We put dry ice inside a flask. When the solid block of dry ice was exposed to air and room temperature it began to evaporate quickly into a gas. This is because of the change in temperature and environment. The next part of this experiment was turning the solid into a liquid. To do this we put it into a large plastic tube with pressure gages at the end. So the dry ice was enclosed and was becoming highly pressurized. We added water as the pressure increased. Then at a certain pressure we released it to become a snow type material. From this we learned how phases of matter change from solid to gas from heat and how solid turns into a liquid with pressure. When liquids are frozen they become solids. Examples of this are pretty basic like water becoming ice.
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December 2016
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