Physical And Chemical Changes

By Brant McLemore

Physical Change

  • The physical property of a substance change, but the identity of the substance does not change.
  • Examples:
  • Changing from one state of matter to the next. ( Ice melts to liquid, liquid boils to gas.
  • Melting 0 degrees C, and Boiling Point 100 degrees C.
  • Slicing bread, melting ice and mowing grass

Physical Properties

  • Any characteristics of a material that can be observed or measured without changing the identity of the material.


Examples:

  • Color and shape
  • Length and mass
  • Volume and density (d=m/v

Chemical Change

  • A change in the identity of the substance due to the chemical properties of that substance.


Examples:

  • Flammability ( fire burning to ash )
  • Reacts with oxygen ( food rotting )
  • Heat and light
  • Electricity ( water can be broken down with electricity )