Physical

1
Physical Chemical Changes
2
Physical Properties

• When observing physical properties, the substance
  remains the same
• Hardness
• Melting Point
• Boiling Point
• Viscosity
• Solubility

3
Physical Changes

• Does not involve the formation of a new
  substance.
• Particles may be rearranged
• Physical properties remain the same.
• Can often get back to original substance
• Examples Smell, taste, melting point, boiling
  point, density.

4
Chemical Properties

• Can only be observed while the substance is
  changing to a new substance
• Light Sensitivity
• Combustibility

5
Chemical Changes

• Involves the creation of a new substance.
• New particles are formed and they have different
  physical properties than before the reaction.
• Examples Iron rusting, magnesium Burning.

6
Chemical Reactions

• How do we know they are happening?

7
Clues for Reactions

• Gas is produced

8
Clues Continued

• The color changes

9
Clues

• Light is Produced

10
And More Clues

• There is a change in temperature
• Endothermic
• Exothermic