• MATTER: Anything that has mass and a 
    volume.
   • ATOMS: The building blocks of matter.
   • MOLECULES: Two or more atoms that are 
    joined together by chemical bonds.
  Physical and 
  Chemical Changes 
   • A change is a substance that does not change the chemical 
    makeup of the substance.
   • EXAMPLES:
    • 1. Breaking Watermelon – Changing from one big piece into 
     multiple smaller pieces.
    • 2. Ice Cream Melting – Changing from one state of matter to 
     another
    Physical 
    Change
     MELTING:                             FREEZING:                           VAPORIZATION:
     •   Solid         Liquid             •  Liquid         Solid
     •   Shape                            •  Shape                            YOUR TURN?!?!
     •   Temperature                      •  Temperature
     CRUSHING:                            BREAKING:                           CONDENSATION:
                                          •  Shape                            •   Gas             Liquid
     YOUR TURN!?!?!                       •  Any Others?!?!?!                 •    What else?!?!
  Characteristics of 
  Physical Changes
   SUBSTANCES STAY THE 
  •
   SAME, BUT SHAPE, SIZE 
   OR FORM DIFFER.
   • 3 states of matter: Solid, Liquid, Gas
   • Phase changes _________ change the particles.
   • They ________ up with ____________.
   • SOLIDS: Structural rigidity and resistance to changes 
    of shape or volume.
         • Particles of solids are tightly packed, vibrating about a fixed 
         position.
  Phases of Matter        
  Matter Changes