Physical Change - a change to a material's physical properties that does not change the identity of the material

• The material isn't changed, only its physical state

Physical Changes

State Change - A common type of physical change

• A material changes its state to:

  • A solid

  • A liquid

  • A gas
    

Changes of State

Common Changes of State

Chemical Change - a change in the identity of a substance due to the properties of that substance

• It is also called a chemical reaction

Chemical Changes

• Reactant - A starting material in a chemical reaction

  • It's like an "ingredient"

• Product - An ending material in a chemical reaction

  • Reactants form products

The language of chemical reactions