5th Grade-Ch. 12 Lesson 1 What are chemical changes
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  • 1. Ch. 12 Lesson 1 What are chemical changes?
  • 2. Activity- Is it a chemical change or physical change? Ice cube melting Water on stove Mix Alka-Seltzer with water Burning candle Mix baking soda with vinegar Chemical or physical change? Observations (using your senses) Demonstration
  • 3. matter undergoes physical changes chemical changes
  • 4. physical change
    • material keeps its identity
    • ex: changes in size, shape, phase of matter
  • 5. sleet STILL H 2 0…
  • 6. chemical change
    • when 1 substance or kind of matter changes into another different kind of matter w/ different properties
  • 7. The chemical and physical properties of rust are different from those of iron.
  • 8. evidence of chemical change
    • color change
    • gas formation
    • formation of a solid
    • change in energy
  • 9. combustion
    • ex. log burning in a fireplace