1. Physical vs. Chemical Changes

2. Learning Scale
4 – Design an experiment to determine the identity of an unknown using its physical and chemical properties. 3 – Differentiate between physical and chemical changes. Explain how mass is conserved during physical and chemical changes 2 – With help, I can describe examples of physical and chemical changes. Describe how temperature influences chemical changes. 1 – Define physical and chemical change.

3. The Law of Conservation of Mass
Mass is conserved (not created or destroyed) when substances undergo chemical changes.

4. Physical Change
Anytime you alter a substance but it is still the same substance.

5. Indicators of a Physical Change
Expected Color Change
Mixing
Change in Shape
Phase Change
Change in Size

6. Chemical Change
When something undergoes a chemical change and forms a new substance.

7. Indicators of a Chemical Change
Fire
Change in Energy – heat, light, sound
Production of a Gas
Unexpected Color Change
Precipitate

8. Physical Change Key Words Chemical Change Key Words
Twisted
Bent
Crushed
Froze
Boiled
Melted
Condensed
Dissolved
Expected Color Change
Burned
Flammable
Fire
Combusted
Cooked
Fizzed / bubbled
Unexpected Color Change
Decomposed

9. Is this a physical or chemical change? Why?

10. Is this a physical or chemical change? A new substance forms

11. Is this a physical or chemical change? Why?

12. Is this a physical or chemical change? Still the same substance

13. Think Pair Share
How can you differentiate between physical and chemical changes?

14. Learning Scale
4 – Design an experiment to determine the identity of an unknown using its physical and chemical properties. 3 – Differentiate between physical and chemical changes. Explain how mass is conserved during physical and chemical changes 2 – With help, I can describe examples of physical and chemical changes. Describe how temperature influences chemical changes. 1 – Define physical and chemical change.