HOMOGENEOUS VS. HETEROGENEOUS MATTER
Classify the following as either homogeneous or heterogeneous.

1.    flat soft drink (no bubbles)                                9.    air (with smog)

2.    chocolate chip ice cream                                    10.    paint

3.    Italian salad dressing                                        11.    alcohol

4.    sugar                                                              12.    iron

5.    soil                                                                 13.    beach sand

6.    aluminum foil                                                  14.    pure air

7.    black coffee                                                     15.    chunky spaghetti sauce

8.    sugar water
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PURE SUBSTANCES VS. MIXTURES
Classify the following as pure substances or mixtures.

1.    sodium                                                            11.    iron

2.    water                                                              12.    salt water

3.    soil                                                                 13.    chocolate chip ice cream

4.    coffee                                                              14.    nitrogen

5.    oxygen                                                            15.    eggs

6.    70% isopropyl alcohol                                      16.    blood

7.    carbon dioxide                                                 17.    table salt

8.    cake batter                                                       18.    nail polish

9.    air                                                                  19.    milk

10.    chicken noodle soup                                       20.    soda


CLASSIFICATION OF MATTER

Check the appropriate categories for the substances listed below.  All substances will have a check in more than one column.

Substance

Heterogeneous
Matter

Homogeneous
Matter

Pure
Substance

Solution

Element

Compound

Mixture

lead metal

 

 

 

 

 

 

 

table salt
(NaCl)

 

 

 

 

 

 

 

Kool-Aid
  drink

 

 

 

 

 

 

 

vegetable
soup

 

 

 

 

 

 

 

oxygen gas

 

 

 

 

 

 

 

distilled water

 

 

 

 

 

 

 

concrete

 

 

 

 

 

 

 

pure gold

 

 

 

 

 

 

 

brass metal

 

 

 

 

 

 

 

flat 7-Up soda

 

 

 

 

 

 

 

raw egg (cracked open)

 

 

 

 

 

 

 

air

 

 

 

 

 

 

 

pure iron

 

 

 

 

 

 

 

iron rust
(Fe2O3)

 

 

 

 

 

 

 

soil

 

 

 

 

 

 

 

baking soda
(NaHCO3)

 

 

 

 

 

 

 

 


PHYSICAL VS. CHEMICAL CHANGES 1

Classify the following as being a chemical or a physical change.

1.    Sodium hydroxide dissolves in water.

2.    Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat.

3.    A pellet of sodium is sliced in two.

4.    Water is heated and changed to steam.

5.    Potassium chlorate decomposes to potassium chloride and oxygen gas.

6.    Iron rusts.

7.    When placed in water, a sodium pellet catches on fire as hydrogen gas is liberated and sodium
       hydroxide forms.

8.    Evaporation.

9.    Ice melting.

10.    Milk sours.

11.    Sugar dissolves in water.

12.    Wood rotting.

13.    Pancakes cooking on a griddle.

14.    Grass growing in a lawn.

15.    A tire is inflated with air.

16.    Food is digested in the stomach.

17.    Water is absorbed by a paper towel.


PHYSICAL VS. CHEMICAL PROPERTIES & CHANGES 2
Part 1 - Indicate whether each of the following describes a chemical or a physical property.
1.    Sulfur is a bright yellow solid.
2.    Sulfur has a low melting point.
3.    Sulfur causes silver to tarnish.
4.    Aluminum is very malleable.
5.    Monuments made of copper corrode in acid rain.
6.    Copper is a good conductor of electricity.


Part 2 - Classify the following as chemical or physical properties.
7.    color                                  14.    solubility
8.    reactivity                             15.    expansion
9.    flammability                        16.    melting point
10.    odor                                17.    rusting
11.    porosity                           18.    reacts with oxygen
12.    stability                             19.    density
13.    ductility                             20.    conductivity


Part 3 - Indicate whether these changes are chemical, physical, or nuclear.
21.    Lead reacts with acid in a car battery.                31.    burning of gasoline
22.    Gasoline burns in a car engine.                        32.    liquefying oxygen
23.    Frost forms on a car window.                           33.    digestion of food
24.    Formation of plutonium from uranium.             34.    tarnishing of silver
25.    Formation of clouds from water vapor.             35.    magnetizing steel
26.    formation of dew on grass                               36.    reacting sodium and water
27.    melting of ice cream                                       37.    dissolving sugar in water
28.    exploding of dynamite                                     38.    burning sugar to produce carbon
29.    fission of uranium                                           39.    decay of radon to lead
30.    sublimation of moth balls                                40.    fusion of hydrogen into helium

 



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