1. From what you've learned in this lesson, why is it possible for the surface of a pond to freeze even though the water underneath is fluid? 2. Sugar dissolves in water but is not an ionic compound. what does this tell you about sugar?

3. Water is used in the cells to help transport in the chemicals necessary to survive. Since cell membranes need to be able to hold in and hold out water without dissolving, what do you suspect cell membranes are made from? Why do you think this?

4. Remember "The Wicked Witch of the West" from The Wizard of Oz? She melted when doused with water. What do you think her cell membranes were made of, and why?

5. Find out why hot water freezes more quickly than cold water, and explain it here.

Use complete sentences to define the following terms or phrases in your own words. (Not all the terms are in the lesson. Using a dictionary or outside site for help is fine, and sometimes necessary, but be sure to use your own words and cite your source!)

6. Heavy water (explain why it's heavier than regular water)

7. Hydrogen bonds - Define and tell why they are important to the cell.

8. Hydrophilic

9. Suspension (Chemical definitions only. Include an example)

10. Solution (Chemical definitions only. Include an example