1. Properties of Matter Section 2
This is the question that your experiment answers
Section 2

2. Physical Properties
Any characteristic of a material that you can observe without changing the makeup of the material
Examples:
Color
Shape
Size
Density
Melting Point
Boiling Point

3. Appearance Appearance is the most obvious physical property
Shape, color, and state of matter can be identified just by looking
They can also be measured
Volume
Temperature
Mass
Diameter

4. Behavior Behavior is also a physical property Examples: Magnetism
Malleable
Ductile
Ability to flow

5. Using Physical Properties to Separate
Some items can be separated by physical properties
Sorting by hand
Sifting
Using a magnet

6. Physical Properties Can be used to identify substances
Many physical properties are specific to the material and remain constant and can be used for identification
Melting point
Boiling point
Density
Specific Heat

7. Physical Changes Any change that does alter the makeup of the material
You can change size, shape, or state of matter without altering the makeup of the material
Sometimes physical change can accompany a color change without changing the composition of the material
Heating a metal until it’s glowing hot
Sometimes color change accompanies a chemical change
Rusting

8. Using Physical Change to Separate
We can also use physical change to separate materials
Distillation is a separation technique that allows separation techniques by boiling point
A mixture is heated until it boils.
All the material that evaporates at a specific boiling point and be captured when it condenses
The material that did not boil at that boiling point is left behind

9. Chemical Properties
Chemical properties are characteristics of a substance that indicate whether it is likely to undergo a chemical change
Flammability
Reactive to light
Reactivity
Toxicity

10. Chemical Change The change of one substance into another
There are several clues that a chemical change is going on
Rapid release of energy
Change of heat
Light
Sound
Bubbling
Color change
Formation of a solid (precipitate)

11. Using Chemical Change to Separate
Silver flatware can become tarnished
Due to silver reacting with sulfur in the air to make silver sulfide
The reaction can be reversed by putting the silver in warm water with baking soda and aluminum foil
In industry and labs, chemical changes like this are used to purify metals

12. The Conservation of Mass
During any chemical change, mass is conserved.
The amount of substance present at the beginning of the reaction will be equal to the amount of substance present at the end of reaction
Then why does there appear to be less mass after a log burns
Mass is “lost” as water and gas