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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Which terms
are NOT related? a. | Scientific journal—research | c. | Bias—personal belief | b. | Independent
variable—change | d. | Constant—change | | | | |
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A researcher
is studying the effects of climate on freshwater life. She sets up an experiment wherein she will
count the number of microscopic organisms, called Paramecium, that survive at a given
temperature. Her results are shown in the graph below.
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2.
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What factor
does temperature represent in the experiment? a. | Independent variable | c. | Control | b. | Dependent variable | d. | Constant | | | | |
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3.
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You
are performing an experiment to determine the relative solubilities of alcohol, oil, salt, and sugar
in water. Which of the following pieces of equipment would be unsafe to use during this
experiment? a. | laboratory
burner | c. | stirring
rod | b. | beaker | d. | balance | | | | |
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4.
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What
property of a wave is represented by X in the diagram? a. | frequency | c. | wavelength | b. | speed | d. | amplitude | | | | |
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5.
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Which
of the following statements is true about light waves? a. | Light waves do
not require a medium. | b. | Light waves move more slowly than sound
waves. | c. | Light waves do not transfer energy. | d. | The wavelength
of a light wave decreases as the frequency decreases. | | |
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6.
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When
a tuning fork is struck by a mallet, the tuning fork vibrates ____. a. | as a standing
wave | b. | at its natural
frequency of vibration | c. | until it falls apart | d. | at different
frequencies depending on how it is struck | | |
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7.
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A
baseball is dropped from a height of 5 m. As the ball falls toward Earth, there is a decrease in its
____. a. | gravitational
potential energy | c. | chemical
potential energy | b. | mechanical energy | d. | kinetic energy | | | | |
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8.
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While
at a picnic, you place a banana on the ground next to you. The banana has stored
____. a. | elastic
potential energy | c. | chemical
potential energy | b. | gravitational potential energy | d. | mechanical energy | | | | |
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9.
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When a
scientist compares two objects or events, what is he or she looking for? a. | differences | c. | similarities | b. | causes and effects | d. | errors | | | | |
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10.
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Sequence the following atoms from greatest to least tendency to gain an electron.
Refer to a copy of the periodic table. Atoms: Ca, Cl, Ga, Rb, S. a. | Cl, S, Ga, Ca,
Rb | c. | S, Ca, Cl, Ga,
Rb | b. | Rb, Ca, Ga, S,
Cl | d. | S, Rb, Ga, Cl,
Ca | | | | |
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11.
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On
the periodic table, metals are on the left side and middle, and nonmetals are on the right side.
Hydrogen is an exception because it is on the left side but is a nonmetal. Metalloids are found
diagonally starting from top left to bottom right of the right side of the periodic table. According
to the art above, most of the elements in the human body can be classified as what
type? a. | compounds | c. | metals | b. | metalloids | d. | nonmetals | | | | |
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12.
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Which
of the following is a physical change? a. | aluminum oxidizing | b. | an acid and a
base forming a salt and water | c. | ice cream melting | d. | paper
burning | | |
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13.
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Using
the data table, on which of these planets is the gravitational force the strongest? a. | Jupiter | c. | Mars | b. | Venus | d. | Saturn | | | | |
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14.
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Which
of the following statements is true? a. | If a moving object slows down, it is
accelerating. | b. | An object does not accelerate if it turns and maintains
constant speed. | c. | Velocity of a moving object is the distance traveled divided by
the time needed to travel the distance. | d. | Friction is the pull that all objects exert on one
another. | | |
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15.
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Tin(IV) chloride and iron metal react to form tin(II) chloride and iron(III) chloride.
Which of the following equations for this reaction shows conservation of mass? a. | SnCl4
+ Fe ®
SnCl2 + FeCl3 | c. | 3SnCl4 + 2Fe ®
3SnCl2 + 2FeCl3 | b. | 2SnCl4 + 2Fe ®
SnCl2 + 2FeCl3 | d. | 5SnCl4 + 4Fe ®
4SnCl2 + 4FeCl3 | | | | |
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16.
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The
ionic compound KBr is dissolved in water. What particle will be surrounded by the positively charged
portions of water molecules in solution? a. | K+ | c. | A KBr crystal | b. | Br- | d. | A KBr
molecule | | | | |
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17.
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Ca(NO3)2 is an ionic solid. What part of the water molecule will
be attracted to the Ca2+ ions in solution? a. | The positive
part, H | c. | The positive
part, O | b. | The negative part, H | d. | The negative part, O | | | | |
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18.
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How
many moles of ions are produced when one mole of Na3PO4 dissolves in
water?
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19.
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The
vapor pressure of a pure solvent is greater than the vapor pressure of a solution of the solvent and
a solid solute. As the number of solute particles present increases, the vapor pressure decreases.
Which of the following solutions of equal concentration has the lowest vapor
pressure? a. | Al(NO3)3 | c. | NaI | b. | Mg(ClO3)2 | d. | SrSO4 | | | | |
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20.
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If
you lift weights faster than normal, you have increased what? a. | Force | c. | Distance | b. | Power | d. | Work | | | | |
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21.
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What
is the IMA of this simple machine if A = 5 m, B = 11 m, and C = 12 m?
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22.
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What
is the efficiency of this machine if its MA = 3 and its IMA = 4?
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23.
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In
the figure, what happens to the radiation at the point labeled “A”? a. | It is absorbed
by the atmosphere. | c. | It is reflected
by the atmosphere. | b. | It is absorbed by Earth’s
surface. | d. | It is reflected
by Earth’s surface. | | | | |
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24.
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For
which of the following processes are gases the least effective at thermal energy
transport? a. | conduction | c. | radiation | b. | convection | d. | collisional | | | | |
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25.
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In
what direction does thermal energy flow naturally? a. | from warm to
warm | c. | from cold to
cold | b. | from warm to
cold | d. | from cold to
warm | | | | |
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