Name______________________________Date_______________________
Period________________
Test Review (practice questions) for Matter Test
1.
A mixture (is/is not) a chemical combining of substances.
2.
In a compound the (atoms/molecules) are (chemically/physically) combined so that
the elements that make up the compound (retain/lose) their identities and (do/do
not) take on a new set of properties.
3.
The smallest identifiable unit of a compound is a(n) __molecule_____,
made up of __atoms__________ which are chemically bonded.
4.
True or False: A mixture is always made up of a combination of elements.
5.
In a mixture, the substances (lose/retain) their identities.
6.
In a mixture the substances involved (can/cannot) be separated by a simple physical
process.
In a compound the elements involved (can/cannot) be separated by a
simple physical process because the elements are (physically combined/chemically
bonded).
7.
True or False: An element can be broken down into a simpler substance.
8.
The smallest identifiable unit of an element is a(n) ___atom________.
which is
9. From the following list of substances, circle the ones that are elements:
silver
carbon dioxide
wood alcohol
chromium
water
hydrogen
carbon
nitrogen
oxygen
gold
sugar
salt
air
sulfur
magnesium
nickel
10. Explain how to separate the sugar and water in a solution of sugar and water.
Evaporation- allow the mixture to sit, open to air. The water will turn to gas and the sugar will
remain.
11. How would you separate a mixture of alcohol and water?
Distillation- boil the mixture. Alcohol will become gas first and water will remain.
12. How would you separate sand and water?
Filtration- pour the mixture through a filter. The water will pass through an the sand will
remain.
Name______________________________Date_______________________
Period________________
13. Classify the following as pure substances or as mixtures:
air -mixture
gasoline -mixture
water - pure
sugar -pure
mercury -pure
oxygen -pure
grain alcohol -mixture
gold -pure
salt water -mixture
14. Classify the following as heterogeneous or as homogeneous:
sand & salt mixture
hydrogen
iron
salt water
unfiltered air
iron with rust
pure water
an apple
nitric acid
tossed salad
granite
wood
15. Classify the following as an element, a compound, a solution, or a
heterogeneous mixture:
aluminum
raisin bread
Element
Heterogeneous Mixture
carbon dioxide
water
Compound
Solution
sugar and water
sulfur
Solution
Element
sulfuric acid
mercury
Compound
Element
an orange
water & instant coffee
Heterogeneous Mixture
Solution
a pencil
carbon particles & sugar
Heterogeneous Mixture
Heterogeneous Mixture
nitrogen
air
Element
Solution
gasoline
grain alcohol
Solution
Solution
16.
What is the difference between a solution, suspension, and colloid? Provide two
examples of each of these terms.
Solution- homogenous mixture- koolaid, coca-cola
Suspension- mixture that can be separated by gravity- Italian dressing, orange juice
Colloid- mixture that scatters light when passed through- milk, smoke
Name______________________________Date_______________________
Place a check in the appropriate column:
Change
Salt dissolves in water.
Physical Chemical Evidence
Change Change
x
A sugar cube is ground up.
Water is heated and changed to steam.
Ice melts.
No new material produced
X
No new material produced
X
No new material produced
x
No new material produced
X
No new material produced
X
X
Sodium and potassium react violently with water.
Pancakes cook on a griddle.
X
Light produced (fire)
x
Color change, bubbles, odor
Ignore
X
Ethyl alcohol boils at 79°C.
X
X
No new material produced
x
Paper burns.
Water freezes at 0°C.
x
Gas produced, light
produced, color change
No new material produced
X
Light produced
X
Gas produced
X
Fireworks explode.
Alka-Seltzer gives off carbon dioxide when added
to water.
Clouds form in the sky.
No new material produced
Color change, odor, gas
produced
No new material produced
Food is digested in the stomach.
Water is absorbed by a paper towel.
Odor, precipitate
No new material produced
Grass grows on a lawn.
A tire is inflated with air.
Color change
X
Milk sours (goes bad).
Sugar dissolves in water.
Gas produced (bubbles)
X
Iron rusts.
Ethyl alcohol evaporates.
No new material produced
x
Hydrochloric acid reacts with magnesium to
produce hydrogen gas.
A piece of copper is cut in half.
Period________________
x
No new material produced
Name______________________________Date_______________________
17.
INSTRUCTIONS: Classify each of the following as an intensive property [I] or an extensive property [E].
Mass
E
Color
Density
I
Volume
Melting point
I
Length
18.
80 g
I
E
E
INSTRUCTIONS: Classify each of the following as a physical property [P] or a chemical property [C].
Color
Density
Flammability
19.
Period________________
___P__
___P__
___C__
Solubility
_P____
Reacts with acid _C____
Combustible
_C____
Calculate the mass of a liquid with a density of 3.2 g/mL and a volume of 25 mL.
3.2 g/mL*25 mL
20.
2.24 g/cm3
A graduated cylinder with 20 mL of water has a mass of 100 g. If a stone is added to the
graduated cylinder, the water level rises to 45 mL and the total mass is now 156 g. What is the
density of the stone?
100 g/25 mL
21.
2.5 L
An irregular object with a mass of 18 kg and a density of 7.2 kg/L displaces water when
placed in a large overflow container. Calculate the volume of water displaced by the object.
(18 kg)/ (7.2 kg/L)