1. Matter has observable properties.
Section 2.1 Outline
Matter has observable properties.

2. Physical properties describe a substance.
Physical property- characteristic of a substance that can be observed without changing the identity of the substance
color
shape
size
d) texture
e) volume
f) mass

3. A. Physical Properties
observing physical properties includes the use of all your senses
measuring can be used to determine physical properties

4. A. Physical Properties (cont.)
examples that a physical property does not change a substance
stretching a rubber band
bending & reshaping clay

5. B. Density
measures the amount of matter in a given volume
usually labeled g/cm3
D = mass ÷ volume (m/v)

6. B. Density (cont.)
Determine the density of a box with a mass of 480 grams and a volume of 60 cm3

7. C. Physical Changes
Physical change – a change in any physical property; not the substance itself

8. C. Physical Changes (cont.)
Examples:
melting ice
cutting paper in half
changing wool into a sweater

9. A. Chemical Properties & Changes
Chemical property – describes how substances can form new substances

10. A. Chemical props. & changes (cont.)
Examples
Combustibility tells how well something can burn
Ability to rust

11. A. Chemical props. & changes (cont.)
Chemical change – one substance changes into another
Combination of atoms are rearranged to make new substances

12. A. Chemical props. & changes (cont.)
examples
Piece of wood burning
Rusting iron
Boiling an egg

13. B. Signs of a Chemical Change
If two or more signs are observed, it is most likely a chemical change
Production of an odor
Change in temperature
Change in color
Formation of bubbles
Formation of a solid