1. Changes in Matter Chapter 2 Section 2
Students know that compounds are formed by combining two or more different elements and that compounds have properties that are different from their constituent elements.
Chapter 2 Section 2

2. Match the Key Terms

3. All Matter. . .

4. Physical Change
Physical Change: Any change that alters the appearance of matter but DOES NOT make a different substance. Examples: Changing the state of matter  solid, liquid, gas Changes in shape or form  dissolving, blending, crushing, chopping, breaking

5. What happened?

6. Chemical Change
Chemical Change: A change in matter that produces NEW SUBSTANCES with properties different from those of the original substances. Bubbles are a sign of a chemical change …production of Carbon Dioxide Examples: Combustion  burning of wood, natural gas Oxidation  Rusting of iron Tarnishing  Tarnish on silverware

7. What happened?

8. Chemical vs. Physical Change

9. What happens to a substance in a physical change?
It changes form or appearance
Is dissolving sugar a physical change?
Yes, if the water dries up, the sugar remains.
How does a chemical change differ from a physical change?
Chemical change produces new substances different from those of the original substances.
When natural gas (methane) combusts, what are the substances that combine?
Is this a physical or chemical change?
Methane mixes oxygen from the air.
Creates CO2 & water. Chemical Change!

10. Law of Conservation of Matter
Matter is never created or destroyed…it is simply changed.
Atoms are not lost or gained, just rearranged.

11. Chemical vs. Physical Slides!
Your job is to create two whiteboard slides.
One slide should be all about physical changes
Include at least 5 examples with pictures and descriptions
Include the definition of a physical change
Include the definition of a physical property
One slide should be all about chemical changes
Include the definition of a chemical change
Include the definition of a chemical property
Use the whiteboard, powerpoint, or open office.
You will present your whiteboards!