Changes in Matter

• Indicators of Physical Change

  • Change in state
  • Physical deformation
  • Change is temporary reversible
• Indicators of Chemical Change

  • temperature changes
  • unexpected colour changes
  • light is given off
  • a solid forms if 2 clear liquids are mixed
  • bubbles are formed
  • different smell
  • energy is released
• Evidences of Chemical Change

  1. Production of heat and light
  2. Evolution of gas
  3. Temperature change
  4. Change in intrinsic characteristics (color, odor)
  5. Formation of precipitate
• Physical change is any change in a substance's form that does not change its chemical makeup.
• Chemical Change occurs when atoms of a substance are rearranged, and the bonds between the atoms are broken or formed.