Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Why should
quantitative experiments be repeated? a. | To publish results | c. | To clearly display information | b. | To communicate
results | d. | To reduce the chance of
error | | | | |
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Animal | Length of digestive system | Diet
category | Animal weight | Koala | 305 cm | herbivore | 10 kg | Dog | 135 cm | carnivore | 11 kg | Rabbit | 272 cm | herbivore | 9 kg | Bobcat | 145 cm | carnivore | 12 kg | | | | |
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2.
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What is the
average weight of the animals in the table? a. | 9.5 kg | c. | 22 kg | b. | 10.5 kg | d. | 42 kg | | | | |
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The table
shows data gathered by a company in a study that compared its product, a cough medicine, to its
competitors’ products.
| | Period of Effectiveness | Brand A | 6
hr | Brand
B | 12 hr | Brand C | 4
hr | Brand
D | 8 hr | | |
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3.
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Based on the
information in the table, what variable did the study test? a. | The names of the
medicines | c. | How long the medicines
lasted | b. | The taste of the medicines | d. | How quickly the medicines took effect | | | | |
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4.
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Why
don’t some consumer magazines contain ads? a. | To comply with government guidelines | c. | To protest against advertising | b. | To avoid
favoritism | d. | To save
space | | | | |
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5.
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A
wave has a wavelength of 10 m and a frequency of 20 Hz. What is the speed of the
wave? a. | 0.5
m/s | c. | 20
m/s | b. | 2
m/s | d. | 200
m/s | | | | |
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6.
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What
is the height of a 2.5-kg mass that has gravitational potential energy of 196 J? a. | 4.6
m | c. | 9.8
m | b. | 8.0
m | d. | 78.4
m | | | | |
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7.
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A
hydraulic lift uses one cylinder that contains a piston with an area of 0.16 m2. The lift
also contains a larger cylinder with a piston area of 0.32 m2. How does the force applied
to the smaller cylinder compare to the force resulting in the larger cylinder if the pressure in the
lift is constant? a. | The force for
the smaller cylinder is greater than the force for the larger cylinder. | b. | The force for
the smaller cylinder is smaller than the force for the larger cylinder. | c. | The forces are
equal for both cylinders. | d. | The relationship of the forces depends on the amount of
pressure in the lift. | | |
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8.
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Bernoulli, a Swiss scientist, discovered that the faster a fluid moves, the less
pressure it exerts. This principle helps explain why airplane wings provide lift for a plane. Look at
the figure below. According to Bernoulli’s principle, where is the air flowing the
fastest?
a. | on the top of
the wing | b. | under the wing | c. | near the top and
bottom surfaces of the wing | d. | It is flowing the same speed both on the top and on the bottom
of the wing. | | |
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9.
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What
type of circuit does the drawing represent? a. | a parallel circuit | c. | a combined series/parallel circuit | b. | a 120-volt
circuit | d. | a series
circuit | | | | |
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10.
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From
its location on the periodic table, which of the following elements would most likely share two pairs
of electrons with other atoms?
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Crude oil
provides many products, but it must be separated into its component parts so that these parts can be
used. This separation process is shown in the diagram and is known as fractional distillation. Crude
oil is heated. As the boiling point of each component of the oil is reached, vapors of this component
leave the mixture. As the vapors rise in the fractionating tower, they are cooled. When each
component is cooled to the point where it changes back to a liquid, it is removed from the tower. The
asphalt left over after the lighter portions are removed is used as a paving material. The lighter
portions, such as gasoline, are often more in demand than the heavier portions, so some of the
heavier portions are broken down into lighter portions in a process called
cracking.
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11.
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What
type of change is cracking? a. | a physical change | b. | a chemical
change | c. | both a chemical change and a physical
change | d. | neither a chemical nor a physical
change | | |
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12.
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Using
the data table, what is the acceleration due to gravity of an object with a mass of 7.7 kg on
Mars? a. | 3.63
m/s2 | c. | 0.04
m/s2 | b. | 9.8 m/s2 | d. | 0.38 m/s2 | | | | |
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13.
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If a
car is traveling 100 km/h and comes to a stop in 3 minutes, what is the acceleration of a passenger
who is using a vehicle restraint? a. | 0.56 m/s2 | c. | –0.56 m/s2 | b. | 0.15
m/s2 | d. | –0.15
m/s2 | | | | |
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Mass of Reactants | Mass of Products | 223.4 g Fe + 96.0 g O2 | ? g Fe2O3 | 44.0 g C3H8 + 160.0 g O2 | 132.0 g CO2 + ? g H2O | ? NH4NO3 | 11.2 g H2O + 13.8 g N2O | | |
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14.
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What
mass of water is produced in the second reaction shown in the table? a. | 72.0
g | c. | 204.0
g | b. | 116.0
g | d. | 336.0
g | | | | |
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15.
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Which
of the following statements is NOT true regarding the conservation of mass? a. | Mass is
conserved in chemical reactions. | b. | Some mass in a chemical reaction is converted to
energy. | c. | The total mass of the reactants equals the total mass of the
products. | d. | The total number of each type of atom in the reactants equals
the total number of each type of atom in the products. | | |
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16.
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Freezing point decreases as the number of particles dissolved in the solution
increases. Which of the following compounds would be most effective in melting ice on the
road? a. | C12H22O11 | c. | KBr | b. | CaCl2 | d. | NaCl | | | | |
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17.
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How
many moles of ions are produced when one mole of Mg(NO3)2 dissolves in
water?
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18.
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Freezing point decreases as the number of particles dissolved in the solution
increases. Which of the following compounds would be most effective in melting ice on the
road? a. | BaCl2 | c. | KCl | b. | C12H22O11 | d. | NaBr | | | | |
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19.
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Which
of the following factors affects the solubility of a gas in a liquid but not the solubility of a
solid in a liquid? a. | Increased surface area | c. | Pressure | b. | Nature of the
solute and solvent | d. | Temperature | | | | |
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20.
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If
there is a clear chemical on your table during a lab, how should you identify it? a. | Ask your
instructor what it is. | c. | Smell the
chemical. | b. | Taste the chemical. | d. | Rub the chemical between your
fingers. | | | | |
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21.
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What
are the potential dangers if a chemical from a lab spills on your hand? a. | Your hand could
catch fire. | b. | You will risk being infected with
bacteria. | c. | You could get a chemical burn. | d. | You could cut
your hand. | | |
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22.
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How
does the momentum of the Moon change when it is struck by a meteor? a. | It slows its
orbit. | b. | It combines its momentum with that of the
meteor. | c. | It reverses direction, changing the
momentum. | d. | The mass decreases, thus decreasing
momentum. | | |
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23.
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A
perfect machine has been built in which there is no friction. If a force of 15 N is exerted on this
machine over a distance of 2 m to move an object, how far will the object be moved if the force
applied by the machine is 3 N? a. | 0.4 m | c. | 10 m | b. | 1.5 m | d. | 5 m | | | | |
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24.
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In
order for convection to occur, density of heated materials must decrease. Which of the following
would cause a decrease in density if the equation for density is r = m/V,
where m is mass and V is volume? a. | m and V remain
constant | c. | V
decreases while m is constant | b. | m increases while V is
constant | d. | V
increases while m is constant | | | | |
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25.
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Movements of the oceanic plates is theorized to occur by a number of processes. Where
two plates come together, one plate is forced below the other and the weight of the plate helps pull
the rest of the plate. This process is known as slab pull. Where two plates move away from each
other, mantle material is pushed up to fill the gap and the weight of the peak pushes the plate
towards the trench. This process is known as ridge push. In the middle of the plate, it is theorized
that the mantle drags on the plate and contributes to the plate motion. Based on the figure and
knowing that the mantle is warmer toward the center of Earth and cooler toward the crust, what
process of thermal energy transfer is contributing to the plate motion?
a. | conduction | c. | radiation | b. | friction | d. | convection | | | | |
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