CK-12 Physical Science Concepts - For Middle School

http://www.ck12.org Chapter 2. Matter

1. Name two factors that affect the boiling point of a substance.


2. Compared with the molecules of many other substances, molecules of water are strongly attracted to each
   other. How is this likely to affect the boiling point of water?

Review

1. What is vaporization?


2. Outline how vaporization occurs.


3. Make a table comparing and contrasting vaporization and evaporation.


4. Define boiling point. What is the boiling point of pure water?


5. Suppose you place an aluminum pot containing water over the flame on a stovetop. Before long, the water
   starts boiling and turning to water vapor. The pot becomes very hot but otherwise appears to be unchanged by
   the increase in temperature. Based on these observations, what can you conclude about the boiling point of
   aluminum?