1. Chemistry and Matter Review

2. What is Matter? Matter- anything that has mass and takes up space. Everything in the world is made of matter.

3. What is Matter? Made of elements (atoms) and compounds/ (molecules). CO 2

4. Physical vs Chemical Change Physical change- Going from solid to liquid or liquid to gas. Or one solid state to another.

5. Physical vs Chemical Change Chemical change- an change in the arrangement of the atoms where a new substance is made. C C O O O O O O O O C C Carbon Oxygen Carbon Dioxide

6. Law of Conservation of Matter Matter is never created or destroyed. - atoms can be rearranged into different compounds and substances, but we can not create or destroy new atoms.

7. Energy Energy is the capacity to do work or transfer heat. Energy

8. 2 Types of Energy 1.Kinetic Energy- Moving energy – Moving people, wind, water, air – Moving electrons = electricity – HEAT! Warming molecules are moving faster 2.Potential Energy – Stored energy – Chemical energy stored in gasoline – A roller costar at the top of a hill – A bouncy ball in your hand

9. Energy First law of thermodynamics: Energy can not be created or destroyed. – Energy input = Energy output – Convert energy from one form to the other – Energy is often lost in the form of heat

10. Energy Second law of thermodynamics- When energy changes from one form to another, we always end up with lower quality, less usable energy. Examples: Only 6% of the energy available in gasoline actually moves the car, the rest is lost. Only 5% of electrical energy is used for light the other 95% is lost as low quality heat. Order Disorder