1. Physical Properties of Matter

2. What Is Matter?

3. Classifying Matter Matter Mixtures Substances Homogeneous Elements
same throughout
cannot be separated into different kinds of matter
Heterogeneous
Compounds
samples are not made of exactly the same portions of matter
two or more elements that cannot be separated by physical means

4. Changes In Matter Physical Change Chemical Change (Example: Digestion)
Chewing breaks up the apple into smaller pieces.
Chemicals break down the apple into simple sugars.

5. Physical Changes In Matter
…are changes in the physical properties of matter.
Examples include phase changes from solid, liquid and gas.

6. Properties of Matter 3 States of Matter
At a Constant Temperature:
Stays the same shape and size
Molecules stay in the same position
Solid 1
Stays the same size
No definite shape
Molecules slide over each other
No definite shape or size
Molecules bounce off each other
Liquid
Fluids 2
Gas
Most common state in universe
High temp. causes atoms to fall apart
Our sun and stars made of plasma. 3
Plasma

7. Water Phase Change Graph

8. m = D V Density of Solids Mass (g) cm3 Density (g/cm3)
height x width x depth

9. Physical Properties of Solids
Hardness – resistance to scratching
Elasticity – ability to stretch and return to their original size
Brittleness – tendency to shatter
Malleable – ability to be pounded into thin sheets
Tensile Strength – measure of how much pulling, or tension a material can withstand before breaking

10. Archimedes’ Principle
Buoyancy
Pressure
Properties of Fluids
Viscosity
Archimedes’ Principle
Charles’ Law
Boyle’s Law

11. What Is Buoyancy? A 3rd Century BC mathematician
Archimedes, discovered...
Force exerted on an object in a liquid…
is EQUAL to…
Buoyancy is the measure of the upward pressure a fluid exerts on an object.
Weight (force) of fluid displaced by that object.

12. A cooler day or a warmer day?
Buoyancy of Gases
Warmer Air
Less Dense Inside
Charles’ Law:
The volume of a gas  (increases) as the temperature .
The volume of a gas  (decreases) as the temperature.
Cooler Air
More Dense
Outside
On which day would it be easier to fly an air balloon?
A cooler day or a warmer day?

13. The Viscosity of Fluids...
is a measure of a material’s resistance to resist flow.
Water
Ketchup
Which the above fluids resists flow more?

14. Viscosity