1. Do Now: Copy Warmup #7 Electric power plants that burn fossil fuels generate billions of tons of carbon dioxide and other gases. How might replacing these power plants with solar cells affect the environment? A. The amount of water vapor in the atmosphere might increase. B Less land might be needed to produce the same amount of electricity. C Forest fires resulting from highly flammable emissions might be avoided. D The amount of released gases that trap atmospheric heat might be reduced.

2. The Language of Chemistry

3. Definition: The study of matter, its properties, its changes, and the energy associated with these changes. Chemistry studies what the entire universe is made of. From the Egyptian word for “earth” “kēme” Subcategories:  Inorganic Chemistry  Organic Chemistry  Biochemistry  Physical Chemistry Chemistry

4. Definition: Anything that has mass and volume. Chemists are especially concerned with the composition of matter. Anything that is matter has a density. The most common thing we deal with that is not matter is LIGHT! Matter

5. Definition: A form of matter with distinctive physical properties. Plasma Gas Liquid Solid Bose-Einstein Condensate Most of the known matter in the universe is in the form of plasma (in stars). Phase or State

6. Liquid Solid Gas Melting Freezing Deposition Sublimation Evaporation Condensation

7. Definition: The ability to cause a change in matter. There are two main types of energy:  Potential Energy  Kinetic Energy Heat, Sound, and motion are all forms of kinetic energy. Chemical energy is a form of potential energy. Energy

8. Definition: Properties that a substance shows by itself without changing into or interacting with other substances. Physical properties are observed by your five senses. Sometimes assistive devices help to determine physical properties. (ie: Microscope)‏ Important physical properties:  Melting and Boiling points  Electrical Conductivity  Density  Viscosity  Volume  Mass Physical Properties

9. Definition: When a substance changes its physical form, but not its composition. Results in different physical properties The chemical makeup of the substance is the same. Some examples of physical changes:  Changes of State  Tearing, breaking, etc.  Dissolving Physical Change

10. Definition: Properties a substance shows as it changes into or interacts with other substances. Chemical properties cannot be observed when substances are not interacting with other substances. Important Chemical Properties:  Reactivity  Flammability  Corrosiveness  Oxidizing Ability Chemical Properties

11. Definition: A substance (or substances) is converted into a different substance (or substances)‏ Also called a Chemical Reaction. Physical properties often change as part of a chemical change. Change of color (for example, silver to reddish-brown when iron rusts). Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat. Change of form (for example, burning paper). Light, heat, or sound is given off. Formation of gases, often appearing as bubbles. Formation of precipitate (insoluble particles). The decomposition of organic matter (for example, rotting food). Chemical Change