Science ppt 3

• Physical Changes - changes that alter the size, shape, location, or physical state of a substance but not its chemical state
• Physical state: solid, liquid, gas
• Physical Change - if the thing is still the same thing after it has been changed..
• Chemical Changes - changes that alter the chemical make up of the substance being changed
• Chemical Change - if you end up with a chemical or chemicals that you did not start with..
• endothermic change - absorption of heat energy
• exothermic change - release of heat energy
• Solid, Liquid, Gas - state of matter
• Mass, Volume, Space - properties of matter