11/18/08

Post date: Nov 18, 2008 2:28:23 AM

Bell Activity: How can you tell if a chemical change has occurred?

• • Signs of a chemical change

    • Different color

    • Gas is produced

    • A precipitant is formed

  • Each sign indicates a new substance is present

  • Observations

    • Ice melting

    • Baking soda and vinegar

    • Milk and lemon juice

    • Food coloring and water

  • Begin quiz review problems