mixing matter
Unit Quiz
Name________________________________________ Date_____________
Directions: Select the best answer for each item below.
1.What are all things made of?
a matter
b atoms
c Both A and B are true.
d Neither A nor B is true.
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3.Read this sentence: Hydrogen
and oxygen atoms bond to
form a water molecule. What
does the word bond mean in
this sentence?
a to move in circles around
b to make more copies
c to share something and
d to split apart from
one another
of themselves
join together
each other
A Water Molecule
hydrogen
atom
2.What do pure iron and pure
gold have in common?
a They are both chemical
b They have the same
c They both only exist
d They are each made up
hydrogen
atom
compounds.
number of electrons
and protons.
oxygen atom
as solids.
of a single element.
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ASSESSMENT
Mixing Matter—Unit Quiz
continued
Name________________________________________ Date_____________
4.What are the three kinds
of particles inside an atom?
a molecules, compounds,
and elements
b protons, neutrons,
and electrons
c helium, carbon,
d core, mantle, and crust
a The cake has
b Heat makes it impossible
c The cake is made up
d The original ingredients no
and hydrogen
5.Scientists identify an ammonia
molecule as NH3. How many
hydrogen atoms are there in
one molecule of ammonia?
a one
b three
c four
d There is not enough
gone through
chemical
changes.
to separate all materials
once they are combined.
of molecules.
longer exist within the cake.
8. Molecule is to atoms as
jigsaw puzzle is to _________.
information to determine
the answer.
a the picture shown
6.How would scientists identify
a molecule that contains
two hydrogen (H) atoms,
one sulfur (S) atom, and
four oxygen (O) atoms?
b the puzzle’s box
c the puzzle’s pieces
d the
table upon which
a HHSOOOO
b Hh2SOooo4
c H2SO4
d HS4O2
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the puzzle is assembled
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on the puzzle
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© iStockphoto.com/Diane Diederich
7.After baking a cake, it is
hard to turn the cake back
into its original
ingredients.
Why is this so?
ASSESSMENT
Mixing Matter—Unit Quiz
continued
Name________________________________________ Date_____________
9.Which of these is an example
of a physical change?
a an apple turning brown
when exposed to air
too long
b fireworks exploding in
c spoiled food smelling
d large rocks getting crushed
bright flashes of color
11.When mixing two liquids
together, what could
the result be?
a a mixture
b a solution
c a suspension
d any of the above
bad in a trash can
to be used as gravel
10.Which of these is an example
of a chemical change?
a rust forming on metal
b raisins and peanuts being
c pouring chocolate syrup
d glass bottles breaking
after it gets wet
mixed in a bowl
over frozen strawberries
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when dropped
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ASSESSMENT
Mixing Matter—Unit Quiz
continued
Name________________________________________ Date_____________
Directions: Use the diagrams below to answer
questions 12–14.
Carbon
6 electrons
6 protons
6 neutrons
Oxygen
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8 electrons
8 protons
8 neutrons
13.Considering the number
of protons and neutrons
in these atoms, which of
these atoms weighs more?
a The oxygen atom
b The carbon atom
c They weigh the
d There is not enough
weighs more.
weighs more.
same amount.
information to determine
the answer.
14.What kind of chemical
compound could be made
just by combining carbon (C)
and oxygen (O) atoms?
12.Which statement about the
carbon atom is true?
a water (H2O)
b carbon dioxide (CO2 )
a It has 18 protons and
c ozone (O3 )
d calcium carbonate (CaCO3 )
neutrons put together.
b It has the same number
c It has more neutrons
d It has more electrons
of protons, neutrons,
and electrons.
than electrons.
15.Extended Response: You have
learned a lot about matter and
what happens when it mixes
with other matter. Explain
two ways that this knowledge
can help you in everyday life.
than neutrons.
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Mixing Matter
Unit Quiz Answer Sheet
I=inferential
1. c I
2. d L
3. c V
4. b L
V=vocabulary
L=literal/recall
D=data analysis
15.Extended Response: Responses will
vary. Students must provide two
examples of how an understanding
of mixing matter can help them
in everyday life. Sample responses
are provided:
• being safe when combining
materials in a school science
experiment
7. a L
• combining ingredients in a recipe
8. c V
• choosing flavors to combine
in foods or drinks
• using a magnet to find a lost metal
object on a playground or beach
• ventilating the house when using
chemicals that give off harmful
fumes
• decorating a yard or garden with
different types of rocks and soils
• preparing a desired color of paint
for a room
• determining whether it is safe to
drink water from a river or lake
5. b I
6. c I
9. d I
10. a I
11. d L
12. b D
13. a D
14. b D
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