#1
CLASSIFICATION OF MATTER: Determine whether each example or property below is a an “element”
(E), “compound” (C), homogeneous mixture (HO) or Heterogeneous Mixture (HE). Then label each as pure substance.
Use your own examples to complete the chart.
Example
1. sand
E, C, HO or HE?
HE
Pure substance?
2. salt
C
yes
3. pure water
C
yes
4. tap water
HO
5. aluminum
E
6. gasoline
HO
7. soda
HO (in bottle or can)
HE (in cup)
8. an egg
HE
9. sugar
C
yes
10. copper
E
yes
11. steel
HO (Alloy, mixture of metals)
12. nitrogen
E
13. air
HO
14. particles combine in any proportion
HO or HE
15. appears like one substance, but shows two
HO
yes
yes
different boiling points
16. only separable by a chemical reaction
C
17. salt water, sugar dissolved in water
homogeneous mixture
18. anything from the Periodic Table
element
yes
19. elements combined in definite proportions
compound
yes
20. concrete, chocolate chip cookie dough
heterogeneous mixture
yes
#2
PHYSICAL VS. CHEMICAL PROPERTIES
I. Fill in the Blanks
_______P__________ properties can be observed without chemically changing matter.
_______C__________ properties describe how a substance interacts with other substances.
_________P________ have definite shapes and definite volumes. solid
_________P________ have indefinite shapes and definite volumes. liquid
________P_________have indefinite shapes and indefinite volumes. gas
II.
Label each property below as physical (P) or chemical (C):
__P___ 1. moth balls vaporize in the closet
__P___
6. butter melts at 30 °C
___C__ 2. hydrofluoric acid attacks glass
__P___
7. sugar dissolves in water
___P__ 3. chlorine gas liquefies at -35 °C
__P___
8. paint dissolves in acetone
___C__ 4. hydrogen gas burns in chlorine gas
__C___
9. baking soda fizzes with acid
__P___ 5. hydrogen gas pours “up” because it is lighter than air
III. Label these properties as chemical (C) or physical (P). Be certain to know the definition of each of
these properties. If you do not know the definition, please look it up!
__C___combustibility
___P__density
___C__tendency to corrode
___C__failure to react
__P___ductility
__C___flammability
__C___odor
__P___malleability
__P___melting point
___P__texture
#3
Physical and Chemical Changes
I.
Fill in the Blanks
Phase changes are ___physical___ changes. _Freezing______ point is the temperature at which a liquid
turns to a solid. It is also equal to the __melting_____ point which is the temperature at which a __solid____
turns to a ___liquid______. ___Boiling____ point is the temperature at which a liquid turns to a gas, and
__condensation____ point is the temperature at which a gas turns to a liquid. Occasionally, a solid turns directly
into a gas without turning into a liquid first. This is called _sublimation____.
II.
Determine whether each change below is physical (P) or chemical (C).
__P___ 1. perfume evaporating on your skin
__C___
5. wood rotting
__C___ 2. autumn leaves changing color
__P___
6. melting copper metal
__C___ 3. burning sugar
___C__
7. baking a cake
___P__ 4. fogging a mirror with your breath
III.
___P__
8. slicing potatoes for fries
Classify each term below as physical (P) or chemical (C).
__P___ 1. boil
__P___6. Melt
__C___ 2. burn (combustion)
___C__7. Bake
___P__ 3. evaporate
__C___8. Tarnish
___P__ 4. dissolve
___C__9. React
___C__ 5. rust
___P__10. Freeze
IV. Label these changes as chemical (C) or physical (P).
___C__digestion of food
___C__explosions
___P__getting a haircut
___C__lighting a candle
____P_evaporation
__C__tarnishing silver
___P__ice cube melting
___C__formation of acid rain
___P__crushing rocks
__P___dissolving salt in water