Section 2: Properties of Matter; Morrison
Scientists try to explain how changes in substances take place. By applying energy, you can tear a sheet of paper into pieces of paper and cause a 1._____________ in the paper.
1. Physical Change
To seperate a solid from a liquid, such as salt from seawater, a process using the 10. ____________ of boiling point called 11. __________ is used.
10. Physical Property 11. Distillation
On a hot summer day, water vapor will condense into water droplets on the outside of a glass of iced tea. The glass of iced tea is a 2. _______ of sugar, tea, lemon, and water.
2. Mixture
Water is a clear, colorless 3._______ at room temperature.
3. Liquid
The words clear and colorless describe two 4. __________ of water.
4. Physical Properties
The melting of the ice in iced tea is a 5._____________.
5. Physical Change
In comparison, a 6.___________ produces a new substance.
6. Chemical Change
When a candle burns, physical and chemical changes take place. The 7._______ of the wax is a physical change.
7. Melting
The melted wax, as it burns, combines with gaseous oxygen in air. After the chemical change, water vapor and carbon dioxide gas are formed. The mass of all substances before a chemical change 8.______ the mass of all substances after a chemical change.
8. Equals
This is called the law of 9.____________________.
9. Conservation of Mass
