1. Physical & Chemical Changes
7-5.10

2. Physical Changes Chemical Changes
Do NOT change the composition of a substance, only the physical properties
No new matter is formed
Forms 1 or more new substances with new chemical and physical properties
New matter is formed

3. Physical Changes Changes in the state of matter
Change in size or shape

4. Change in the state of matter
3 states of matter: solid, liquid, gas
Melting
Solid to a liquid
Freezing
Liquid to Solid
Evaporating
Liquid to Gas
Condensation
Gas to Liquid
Sublimation
Solid to gas OR gas to solid

5. Change in size or shape Cutting Tearing Stretching Wrinkling
Dissolving

6. Chemical Changes Change in color Change in temperature
Formation of a precipitate
Formation of a gas

7. Change in color Apple turning brown Iron rusting Clothes when bleached
Marshmallows turning black when burned

8. Change in temperature
When substances combine and temperature increases or decreases
Ex:
Wood burns to ash or gases & temperature increases

9. Formation of a precipitate
When solutions (liquids) are combined, they form a solid substance (precipitate)

10. Formation of a Gas
When solid or liquid substances combine, they may form gas bubbles
Ex:
Baking soda & vinegar
Alka seltzer & water

11. Review When NEW matter is formed Dissolving Sublimation
Change in color
Ice melting
Wood burning
Gases being formed
Precipitate

12. STUDY GUIDE Physical properties Chemical properties Physical changes
Chemical changes
Sublimation
Precipitate
Atoms
Compounds
Balanced/unbalanced
Acid
Base
Density
Metal
Nonmetal
Reactant
Product
Yield/make
Periods
Family/Group
Subscripts
coefficients