1. Chapter 3: Matter – Properties and Change

2. A. Properties of Matter Substance Examples:
– matter that has a uniform composition
Examples:
water
table salt
gold
copper
Things that are not substances:
Salt Water
Samples from different areas have different composition

3. A. Properties of Matter Cont.
Physical Property
Can be observed or measured without changing the sample’s composition
Density
Color
Taste
Hardness
Boiling Point

4. A. Properties of Matter Cont.
Chemical Property
Ability of a substance to combine or change into another substance
Does it burn in air?
Does it react with water?
Does it react with nothing?

5. B. States of Matter
4 states of matter
Solid
Liquid
Gas
Plasma

6. Compressibility: Can you compress it?
B. States of Matter
Compressibility: Can you compress it? NO NO
YES

7. Practice Physical or chemical property? Iron and oxygen forming rust
Iron is more dense than aluminum
Magnesium burns brightly when ignited
Hemoglobin binds with oxygen
Mercury melts at -39oC

8. Practice Match the states of matter with the following descriptions:
(1) solid (2) liquid (3) gas
A. takes the volume and shape of its container
B. has a definite volume but an indefinite shape
C. has a definite volume but an indefinite shape

9. C. Physical vs. Chemical Changes
Physical Change
Does not change the substance
Substance may seem different, but the way the atoms link up is the same
Chemical Change
A new substance forms
Changes the way the molecules link up

10. It’s a physical change if…
D. Physical Changes
It’s a physical change if…
It changes shape or size
It dissolves
It changes phase
Freezes, boils, evaporates, condenses

11. It’s a chemical change if…
E. Chemical Change
It’s a chemical change if…
A gas is produced (bubbles)
A change in color
A change in temperature
A precipitate forms
Light is produced
New odor
Explosion

12. Mixes vinegar and baking soda
Practice
Physical or Chemical Change…
Crumpling Paper
Burning Paper
Cutting wood
Crushing a can
Melting Ice
Rusting
Mixes salt and water
Mixes vinegar and baking soda