Scientists try to explain how changes in substances take place. By applying energy, you can tear a sheet of paper into pieces and cause a ____ in the paper. 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 ____ of sugar, tea, lemon, and water. Water is a clear, colorless ____ at room temperature. The words clear and colorless describe two ____ of water. The melting of the ice in iced tea is a ____. In comparison, a ____ produces new substances. When a candle burns, physical and chemical changes take place. The ____ of the wax is a physical change. The melted wax, as it burns, combines with gaseous oxygen in the air. After the chemical change, water vapor and carbon dioxide gas are formed. The mass of all substances before a chemical change ____ the mass of all substances after a chemical change. This is called the ____. To separate a solid from a liquid, such as salt from seawater, a process using the ____ of boiling point called ____ is used.

Properties of Matter [Missing Words]

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