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Summary Questions
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<font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF"><strong>Phase Change:</strong> Summary Questions</font>
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<td><img src="atomMainIdea.png" width="98" height="58"></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">
In this activity you have learned about the arrangement and movement of atoms and molecules in each state of matter, the role of the intermolecular attractions in phase change, and about how energy relates to changing phases of matter. Please answer the questions below to summarize what you have learned.
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<font size="4" face="Arial, Helvetica, sans-serif"><strong>A and B are two
pure materials at the same temperature. A is a gas and B is a solid. What
must be true about these substances:</strong></font>
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The molecules of A have less mass than the molecules of B.
The molecules in A are moving faster than the molecules of B.
<html>The attractions between A molecules are less than the <br>attractions between B molecules.
A and B only.
A, B, and C.
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<font size="4" face="Arial, Helvetica, sans-serif"><strong>Suppose you are
small enough to sit on a molecule. Describe what you see if you were
sitting on a molecule in a gas, and that gas turned into a liquid.</strong></font>
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<font size="4" face="Arial, Helvetica, sans-serif"><strong>On a
microscopic scale atoms look to be just about as crowded in a liquid as in
a solid. What are some ways you can think of to decide whether a substance
is a solid or a liquid.</strong></font>
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<font size="4" face="Arial, Helvetica, sans-serif"><strong>When you get
out of the water after swimming, you often feel cold as water evaporates
off of your skin. That means you must be losing heat energy. As the water
evaporates, it is changing from a liquid to a gas. Explain why the process
of evaporation should use up heat from your skin.</strong></font>
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Phase Change
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