1. 2.2 Physical Properties

2. objectives
ppt
241---vocab
242---P/C Properties wkst

3. 2.2 Objectives…pg 235 What are some examples of Physical Properties?
Before:
After:
How can knowing the Physical Properties of matter be useful?
What processes are used to separate mixtures?

4. Examples of Physical Properties
A physical property is any characteristic of a material that can be observed or measured without changing the composition of the substances in the material.
Examples: Viscosity, Conductivity, Malleability, Ductile, Brittleness, Hardness, Melting Point, Boiling Point, Density, Size, Shape, and Color

5. Viscosity Viscosity is a substance’s resistance to flowing.
The slower the liquid, the higher the viscosity.
The faster the liquid, the lower the viscosity.
Viscosity decreases when the substance is heated and increases when the substance cools down.
Examples: Maple Syrup- high viscosity vinegar- low viscosity

6. Conductivity
A material’s ability to allow heat or electricity to flow is called conductivity.
Materials that have high conductivity are called conductors. (metals)

7. Malleability and Ductile
Malleability is the ability of a solid to be flattened into a thin sheet. (copper, gold, aluminum)
Ductile is the ability of a solid to be formed into a wire. (copper)

8. Others Hardness: How hard or soft is the substance
Melting Point: Temp. at which the substance melts.
Boiling Point: Temp. at which the substance boils
Density: The ratio of mass of a substance to its volume.

9. Recognizing Physical Changes
A physical change occurs when some of the properties of a material change, BUT the substance in the material remains the same.
Crumpling a piece of paper
Cutting a tomato
Physical changes can be reversed
Ice, water, and water vapor

10. Condense
Freeze
Melt
Evaporate
Solid
Liquid
Gas

11. Classification of Matter