Physical and Chemical Change

Physical Change
-concerned with energy and states of matter
-does not produce a new substance
ex. crushing a can, melting an ice cube, and breaking a bottle










Chemical Change
-takes place on the molecular level
-makes a new substance
 ex. burning, cooking an egg, rusting an iron pan, and mixing hydrochloric acid and sodium to make salt and water

1. Label each process as a physical or chemical change:

a. perfume evaporating on your skin
b. butter melting
c. wood rotting
d. charcoal heating a grill
e. autumn leaves changing color
f. a hot glass cracking when placed in cold water
g. melting copper metal
h. burning sugar
i. mixing sugar in water
j. digesting food

2. Label each process as a physical or chemical change:

a. Moth balls gradually vaporize in a closet
b. hydrofluoric acid attacks glass (used to etch glassware)
c. A chef making a sauce with brandy is able to burn off the alcohol from the brandy, leaving just the brandy flavoring
d. Chlorine gas liquefies at -35 °C under normal pressure
e. hydrogen burns in chlorine gas