1. Ch. 18 - Matter Properties & Changes in Matter (p.560-567)
Physical vs. Chemical Props.
Physical vs. Chemical Changes

2. A. Physical vs. Chemical Props.
Physical Property
can be observed without changing the identity of the substance (describes appearance or behavior of substance)
Chemical Property
describes the ability of a substance to undergo changes in identity

3. B. Physical vs. Chemical Props.
Examples:
melting point
flammability
density
magnetic
tarnishes in air
physical
chemical

4. B. Physical vs. Chemical Changes
Physical Change
changes the form of a substance without changing its identity
properties remain the same
Chemical Change
changes the identity of a substance
substance(s) made (products) have different properties

5. B. Physical vs. Chemical Changes
Signs of a Chemical Change
change in color or odor
formation of a gas
formation of a precipitate (solid)
change in light or heat

6. B. Physical vs. Chemical Changes
Examples:
rusting iron
dissolving in water
burning a log
melting ice
grinding spices
chemical
physical

7. Click on Einstein to see a short video on chemical/physical
properties and changes.