physical science questions. which of the following should be used to boil 75 milliliters of a...
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Physical Science Questions
Which of the following should be used to boil 75 milliliters of a
liquid?
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25% 25%25%25%A. B.
C.
D.
What change should be made to cause the pendulum to swing to
point X?
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25% 25%25%25%A. Using a ball with smaller mass
B. Swinging the ball with less force
C. Lengthening the string holding the ball
D. Starting the ball from a higher position
Maintaining moisture content is one aspect of keeping food fresh. Which of these experimental
designs would be best to use to determine whether plastic sandwich bags help keep food
fresh?
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25% 25%25%25%A. B.
C. D.
Which of these models shows the atom with the most mass?
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25% 25%25%25%A. B.
C. D.
Diamonds have a density of 3.5 g/mL. Where would a diamond come to rest if dropped into the cylinder shown below?
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25% 25%25%25%A. On top of
the etherB. On top of
the waterC. On top of
the mercuryD. On the
bottom of the container
After an experiment, researchers concluded
that one species of bacteria could break down
a certain kind of hazardous waste. Beforeannouncing this conclusion, the
researchersshould —
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25% 25%25%25%
A. repeat the experiment to make sure the results are reproducible
B. write a formal hypothesis statementC. ignore the results of similar
experiments by other researchersD. plot the data on appropriate graphs
A chemical reaction that releases heat is classified as —
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21 22 23 24 25 e
xoth
erm
ic
repl
acem
ent
syn
thes
is
auto
nomic
25% 25%25%25%A. exothermicB. replacementC. synthesisD. autonomic
Which of these molecules is composed of exactly four atoms?
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21 22 23 24 25 K
ClO4
NH4
Cl2
O
H2O
2
25% 25%25%25%A. KClO4
B. NH4
C. Cl2O
D. H2O2
All of these are subatomic particles
EXCEPT —
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ions
pro
tons
ele
ctro
ns
neu
trons
25% 25%25%25%A. ionsB. protonsC. electronsD. neutrons
All of these could cause disruptions in the reception of radio waves
EXCEPT —
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clo
ud c
over
lightn
ing b
olts ra
in
vis
ible
light
25% 25%25%25%A. cloud coverB. lightning boltsC. rainD. visible light
How many atoms of oxygen are in one
molecule of Mg(ClO)2?
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21 22 23 24 251 2 3 4
25% 25%25%25%A. 1B. 2C. 3D. 4
The picture shows one part of the periodic
table of the elements. According to thisinformation, how many protons does a
carbonatom contain?
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25% 25%25%25%
A. 0.0111B. 6C. 12.0111D. 18
What is the main reason that this label has
the instructions “Shake well before using”?
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25% 25%25%25%
A. Oil does not easily mix with vinegar.
B. Chemical changes occur when different liquids are mixed.
C. Salt does not quickly dissolve in a mixture.
D. Solutions containing suspended air have fewer calories.
How many electrons does gold (Au) have?
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25% 25%25%25%
A. 79B. 118C. 197D. 276
Which phase of matter is represented by steam?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 P
lasm
a
Solid
Liq
uid G
as
25% 25%25%25%A. PlasmaB. SolidC. LiquidD. Gas
The picture shows the design of an electric
circuit that fails to produce light. This circuit
could be made to work by —
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25% 25%25%25%A. using a bulb with higher wattage
B. moving the switch to the open position
C. connecting another 9-volt battery
D. attaching the wires to separate poles on the light
This tool is used to measure —
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25% 25%25%25%A. volumeB. pHC. temperatureD. weight
All of these are important pieces of safety equipment EXCEPT —
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a fi
rst-a
id k
it
a fi
re e
xtin
guisher
an e
ye-w
ash
stat
ion
a g
radu
ated
cyl
inder
25% 25%25%25%A. a first-aid kitB. a fire extinguisherC. an eye-wash
stationD. a graduated
cylinder
Which of these contains 90 milliliters of solution?
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25% 25%25%25%A. B.
C. D.
Which of these models best illustrates a
mixture?
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25% 25%25%25%A. B.
C. D.
The model shows the structural formula for
methane. Which of these is the properchemical formula for methane?
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25% 25%25%25%
A. 4CHB. CH–4
C. 2CH2
D. CH4
This reaction may be classified as exothermic because —
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25% 25%25%25%
A. hydrogen bonds with chlorine
B. two molecules of acid are formed
C. the equation is balancedD. heat is produced
In this model of a periodic table, a group of elements that are arranged in a
vertical column is called a —
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25% 25%25%25%
A. gasB. familyC. clusterD. precipitate