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WorksheetsEOC Practice Test
Total questions: 40
Worksheet time: 21mins
A 10 kg cart with a momentum of 10 kg ∘ m/s hits a 20 kg cart at rest. Momentum is calculated by using the formula p = mv, where m is the mass of an object and v is the velocity of an object. What is the momentum of the system after the collision?
2 kg ∘ m/s
10 kg ∘ m/s
20 kg ∘ m/s
30 kg ∘ m/s
Which model shows electric field lines surrounding a positively charged object?
A
B
C
D
Jesse is curious about what happens when liquids of different temperatures are mixed. Select the equipment Jesse needs to conduct this investigation.
beaker
thermometer
stopwatch
warm water
cold water
A 4 kg object is traveling to the right at a constant velocity of 16 m/s across a surface. The formula for momentum is p = mv, where "m" is mass and "v" is velocity. Calculate the momentum if the mass of the object (4kg) was held constant but the velocity was half as much (8 m/s). Enter your number only - the units are kg ∘ m/s.
(a)
--YOU MAY USE A PERIODIC TABLE FOR THIS QUESTION--
Sodium chloride, commonly known as table salt, is made of sodium (Na) and chloride (Cl) ions. Which of the following is the simplest formula unit for sodium chloride?
NaCl
Na2Cl
NaCl2
Na3Cl2
A roller coaster car has a mass of 250 kg. The car is sitting on top of a 25m hill. The gravitational potential energy of the car at the highest point of the track is 61,250J. Kinetic energy can be modeled by the formula KE = 21 mv2 , where m is the mass of an object and v is the velocity of an object. What is the maximum velocity of the roller coaster car at the lowest point of the track?
22 m/s
175 m/s
490 m/s
30,625 m/s
Which factors could increase reaction rate? Select all that apply.
introducing an inhibitor
increasing the temperature of the system
increasing the surface area of a solid reactant
increasing the concentration of one of the reactants
increasing the size of the container in which the reaction occurs
Which of the following objects have balanced forces acting upon them? Select all that apply.
one at rest on a table
one that is accelerating
one that is rolling to a stop
one that is falling after being dropped
one moving to the right at a constant velocity
Scientists estimate that the moon gets farther away from Earth by 3.8 centimeters each year. As the distance increases over time, the gravitational force between the two objects...
increases
decreases
stays the same
The diagram shows two negatively charged particles separated by a distance. The two charges...
repel one another
are attracted to one another
are not affected by one another
The diagram shows two negatively charged particles separated by a distance. When two negatively charged objects are brought closer together, the objects will...
lose energy
gain energy
have the same amount of energy as before
Which conditions below could result in the balloons hanging as shown in the diagram?
neither balloon is charged
the balloons are oppositely charged
both balloons are positively charged
both balloons are negatively charged
one is charged and the other is neutral
Kinetic energy can be modeled by the formula KE =21mv2 , where m is the mass of an object and v is the velocity of an object. If all of the potential energy of the ball is transformed into kinetic energy, what is the velocity of the ball at the point of maximum kinetic energy?
5 m/s
10 m/s
100 m/s
1,250 m/s
Select the words to correctly complete the sentence. Beaker A receives 10 mL of water at 10°C and Beaker B receives 50 mL of water at 10°C. The temperature change in Beaker A will be...
less than the temperature change in Beaker B
the same as the temperature change in Beaker B
greater than the temperature change in Beaker B
Which of the following would describe metals? Choose all that apply.
sodium
fluorine
contains many gases
conducts electricity in the solid state
tend to lose electrons to form positive ions
A sodium atom has _____ valence electrons.
1
7
2
8
A chlorine atom has _____ valence electrons.
1
7
2
8
The mass of the system will...
increase
decrease
stay the same
The velocity of the system will...
increase
decrease
stay the same
The momentum of the system will...
increase
decrease
stay the same
Which type of nuclear process is shown by the model in the figure?
fission
fusion
Which type of nuclear process is shown by the model in the figure?
fission
fusion
What would result in the greatest gravitational force between two objects?
halving the mass of object 1
doubling the mass of object 1
halving the distance between the two objects
doubling the distance between the two objects
Earth has a mass of 5.97 x 1024 kg and Earth's moon has a mass of 7.35 x 1022 kg. The distance between the center of Earth and the moon is 3.84 x 108 m. Which represents the gravitational force of attraction between Earth and the moon?
1.98 x 1020
3.81 x 1020
7.62 x 1028
2.97 x 1030
Observe the chemical reaction. To create more reactants...
apply heat to the reactants
double the amount of
product
double the amount of reactants
Sodium forms an ion with a _____ charge.
+1
-1
+2
-2
Chlorine forms an ion with a _____ charge.
+1
-1
+2
-2
Which of the following changes would result in the greatest gravitational force?
decreasing the distance between the objects to 41
doubling the mass of both objects
doubling the distance between the two objects
Which of the following changes would result in the least gravitational force?
decreasing the distance between the objects to 41
doubling the mass of both objects
doubling the distance between the two objects
Select the correct coefficients to balance the equation.
1, 1, 2
1, 2, 3
2, 2, 1
2, 1, 3
Sometimes its helpful to describe light as a wave, while other times describing light as a particle is more helpful. Which choices would best fit the WAVE model of light? (choose ALL that apply)
bends at entry of a new medium
produces a shadow
creates an interference pattern
pulls into a new medium with force
A student is asked to develop a model to illustrate the life span of our sun. Which factors must be included in the model?
(choose ALL that apply)
size
color
time scale
composition
location of the sun in the universe
The balanced chemical equation for the synthesis of water is shown. Which statement explains how mass/matter is conserved in this reaction?
the number of molecules is the same on both sides of the equation
the number of atoms of each element is the same on both sides of the equation
mass/matter is NOT conserved in this equation
the number of coefficients is the same on both sides of the equation
Which statement is evidence that supports the Big Bang Theory?
There are uniform cosmic gravitational forces in the universe.
There is uniform cosmic background radiation in the universe.
The observable long wavelengths of light indicate that galaxies are moving toward us.
The observable short wavelengths of light indicate that galaxies are moving away from us.
It takes Earth approximately 365 days to orbit the sun. When Earth moves away from the sun, its acceleration _____.
increases
decreases
remains constant
It takes Earth approximately 365 days to orbit the sun. Earth's velocity is fastest when it is _____.
closest to the
sun
farthest from the sun
halfway between the sun and the farthest point in orbit
A volcanic eruption can add carbon dioxide, sulfur dioxide, and ash to the atmosphere. The diagram represents a volcanic eruption. In what way does a volcanic eruption MOST affect climate?
trans the sun's radiation and increases air temperatures
reflects the sun's radiation and decreases air temperatures
absorbs the sun's radiation and increases ocean temperatures
transfers the sun's radiation and decreases ocean temperatures
The graph shows a heating curve for water. A sample of water is heated to 120 degrees Celsius. As heat is added between points A and B, the temperature of the water remains a constant 100 degrees Celsius. During this boiling phase, the temperature remains constant because all of the energy added to the system is being used
to form surface tension between molecules
to form hydrogen bonds between molecules
to overcome energy forces creating the molecules
to overcome attractive forces creating the molecules
When the cannon is fired, the cannon ball moves the the left, while the cannon moves to the right, and the net force is
balanced
unbalanced
The cannon ball moves to the left and is met with air resistance, resulting in _____ net force on the cannon ball.
a balanced
an unbalanced
