1. Changes in Matter
Ch. 1.3
Pages
Brain Pop = States of Matter

2. Chemistry
Chemistry is mostly about changes in _Matter__.

3. I. Physical Change
A. A _physical__ change is any change that alters the ___form_ or _appearance__ of matter but does _NOT_ make any substance into a different substance.
B. A _substance__ that undergoes a _physical__ change is still the _SAME__ substance after the change.

4. Physical Change
C. Matter occurs in 3 states: _SOLIDS_ , __LIQUIDS__ and __GASES_.
1. A change in state from a __solid_ to a _liquid__ is a physical change.
States of Matter Song = (3:55)

5. Physical Change 2. _Dissolving_ is a physical change.
3 .Examples of physical changes:
Bending, crushing, breaking, chopping, anything that changes the shape or form of matter

6. Physical Change

7. II. Chemical Changes
A. A change in matter that produces 1 or more new substances is a _chemical_ change.
1. Hydrogen Peroxide on skin = _Water_ + _Oxygen_ gas
2. Iron Metal + Oxygen = _Iron_ _Oxide_
(also called Rust)
Chemical Energy (2:44)

8. Chemical changes
Heat Song (1:35)

9. Chemical Changes
B. Unlike a physical change, a _Chemical_ change produces _NEW_ substances with properties _different_ from the original substance.
1. What is combustion?
Rapid combination of a fuel
with Oxygen, produces Light,
Heat and New Substances
Brain Pop = Heat

10. Chemical Change 2. What is oxidation?
Slow combination of a substance with Oxygen 

11. Chemical Change 3. What is tarnishing?
Slow combination of a Metal with Sulfur producing a dark coating on the Metal

12. Chemical Change
C. in 1770s Lavoisier showed that _NO_ mass was lost or gained during the _change_.
D. The law of Conservation of Mass states that _Matter_ is NOT created nor _destroyed_ in any chemical or physical change.
E. Sometimes called the Law of Conservation of Matter.
(Mass measures Matter)
1. No mass is lost because during a chemical change, atoms are not lost or gained, only _rearrranged_.
Brain Pop = Law of Conservation of Mass

13. III. Matter and Thermal Energy
A. _Energy_ is the ability to do work or cause change.
B. Every _chemical_ or _physical_ change in matter involves a _change_ in energy.

14. Energy
C. _Temperature_ is a measure of the average energy of the random motion of particles of matter.
D. _Thermal_ Energy = _TOTAL_ energy of all the particles in an object.
Brain Pop = Temperature

15. Energy
E. _Endothermic_ Change is a change in which energy is taken in.
1. Example of Endothermic Change:
Melting Ice
Changes in Matter

16. Energy F. _Exothermic_ Change releases energy.
1. Examples of Exothermic Change:
 Combustion
Warming your Hands by a Fire
Chemical Reactions (3:59)