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1. How do fish obtain oxygen for breathing?

2. Why does warming water enable it to dissolve more of a salt?

3. Why does warming water lessen the amount of a gas that will stay in solution?

4. Will water absorb gases of strong odor? How do you know?

5. Name three solvents. Give a use for each.

6. What liquids usually contain gases in solution? Name some uses for these dissolved gases.

7. What is the weight of a cubic meter of water?

8. Name three substances obtained by crystallization.

9. How is maple sugar obtained?

10. Name five crystalline substances.