Chapter 2 Matter

1
Chapter 2Matter

• Section 3- Changes of Matter
• p. 53

2
Objectives

• Recognize the signs of a physical or chemical
  change

3
I. Physical Changes- Changing from one form to
another without changing the substance
A. State change- Melt, freeze, boil,
condensation, sublimation B. Dissolving C.
Mixtures- can be physically
separated YouTube - Mixtures and compounds
4
II. Chemical Changes- one or more substances
are changed into entirely new substances
A. Examples- batteries, burning,
spoiling, effervescent tablets, rusting,
explosion B. Cannot be reversed by physical
means C. Compounds can be broken down by
chemical means
5
D. Evidence of a chemical change can include
2. Color change
1. Sound production
3. Heat produced
4. Explosion
5. Gases produced
6. Change in odor, taste, texture
7. Light produced
8. Energy given off/taken in (Temperature change)