Transcript Physical Science FCAT Module #2

Think-Pair-Share
FCAT Practice
During this activity, students will have
individual time to think about a question
related to FCAT 2.0. They will then pair up
with a partner to share their thoughts.
Finally, the pairs will select one major
explanation to share with the entire class.
Think
Think about the answer options. Decide which answer
you believe is correct and explain why the other
options might be possible but incorrect. Write your
explanations in your science journal:
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Pair
Start a discussion with your partner(s) by asking
him/her to explain their response to the “Think” part
of this sheet (above). Combine your ideas and
summarize your discussion in your science journal:
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Share
Share with the whole class the most important points
from your "Paired" discussion. To prepare for sharing,
list below the most important point you would like to
share with the entire class in your science journal:
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Practice Problems
SC.7.P.11.2
Investigate and describe the
transformation of energy from one
form to another.
John’s mom works as a scientist as the Space
Center. She tells John that a rocket requires
a large amount of energy to launch. The
required energy is generated by burning
liquid fuel.
Which type of energy is
stored in the liquid fuel?
A. kinetic energy
B. thermal energy
C. chemical energy
D. electrical energy
√heck the answer
ANS: C
A. is incorrect because the stored energy is
converted to kinetic energy, but is not stored in
the form of kinetic energy.
B. is incorrect because some of the energy would be
converted to thermal energy, but the energy is
not stored in the form of thermal energy.
C. is correct because liquid fuel has potential
energy in the form of chemical energy. When the
fuel is burned, the chemical energy is converted
to other forms of energy including kinetic
energy, light energy, thermal energy, and sound
energy.
D. is incorrect because liquid fuel stores energy in
the form of chemical energy, not electrical
energy.
During a science experiment, students compress
four springs and then release them.
In which position
would the greatest
conversion of elastic
energy to kinetic
energy occur when
the spring is
released?
A. Position 1
B. Position 2
C. Position 3
D. Position 4
√heck the answer
ANS: D
A. is incorrect because Position 4 shows greater
compression than Position 1. The spring with
the greatest compression will have the greatest
elastic energy.
B. is incorrect because in Position 2, the spring is
least compressed, giving it the lowest elastic
energy.
C. is incorrect because Position 4 shows greater
compression than Position 3. The spring with
the greatest compression will have the greatest
elastic energy.
D. D is correct because the spring has the greatest
elastic energy when it is compressed the most.
Juan serves a tennis ball. He throws the tennis
ball into the air and hits it with his racket when
it reaches its highest point. Once he hits the ball,
it moves forward and downward, eventually
hitting the ground after it goes over the net.
At which point is kinetic energy converted
to gravitational potential energy?
A. just before Juan throws the ball
B. just after Juan throws the ball into the
air
C. just after Juan hits the tennis ball
D. just before the tennis ball hits the
ground
√heck the answer
ANS: B
A. is incorrect because at this point, there is no
conversion of energy.
B. is correct because at this point, the ball moves
upward, so kinetic energy is being converted to
gravitational potential energy.
C. is incorrect because at this point, the ball is
moving forward and downward, so gravitational
potential energy is being converted to kinetic
energy.
D. is incorrect because at this point, the ball is
moving forward and downward, so gravitational
potential energy is being converted to kinetic
energy.
Alonso is camping with his family. His
torch runs on two batteries.
Which type of energy is stored in the
batteries?
A. light energy
B. thermal energy
C. chemical energy
D. electrical energy
√heck the answer
ANS: C
A. is incorrect because the stored energy is
converted to light energy, but it is not stored
as light energy.
B. is incorrect because the stored energy is
converted to thermal energy, but it is not
stored as thermal energy.
C. is correct because a battery stores energy in
the form of chemical energy.
D. is incorrect because the energy is stored in
the form of chemical energy and then
converted to electrical energy.
Rachel is cooking breakfast before she
leaves for school.
In which of the following
electrical appliances is electrical
energy converted to kinetic
energy?
A.
B.
C.
D.
blender
oven
stove burner
toaster
√heck the answer
ANS: A
A. is correct because an electric blender
converts electrical energy to kinetic energy.
The kinetic energy causes the blades to spin.
B. is incorrect because an electric oven
converts electrical energy to thermal energy.
C. is incorrect because an electric stove burner
converts electrical energy to thermal energy.
D. is incorrect because an electric toaster
converts electrical energy to thermal energy
and light energy.
Energy in a Roller Coaster Ride - See potential
energy convert to kinetic energy in this
interactive activity from WGBH that shows a
roller coaster in action.
Masses and Springs - In this interactive simulation
adapted from the University of Colorado's Physics
Education Technology project, hang various masses
from different springs and see the kinetic,
potential, and thermal energy of each spring
system. You can even slow time or move your
demonstration to another planet.
Practice Problems
SC.7.P.10.4
Observe and describe that heat flows in
predictable ways, moving from warmer objects
to cooler ones until they reach the same
temperature.
Joe places two solid objects in contact with
each other. Which property determines the
direction of the flow of heat between the
two
A. material of the objects
B. volume of the objects
C. density of the objects
D. temperature of the
objects
√heck the answer
ANS: D
A. is incorrect because the direction of heat
flow depends on the relative temperatures of
the objects, not their materials.
B. is incorrect because the direction of heat
flow depends on the relative temperatures of
the objects, not their volumes.
C. is incorrect because the direction of heat
flow depends on the relative temperatures of
the objects, not their densities.
D. is correct the direction of heat flow depends
on the relative temperatures of the objects.
Heat flows from the warmer object to the
cooler object.
Myra places two objects in contact. One
object is warmer than the other object.
Which type of heat transfer is she most likely
testing?
A. conduction
B. convection
C. insulation
D. radiation
√heck the answer
ANS: A
A. is correct because conduction is the transfer of
heat between two objects that are in contact
with each other.
B. is incorrect because convection is the transfer
of heat caused by the movement of particles in
a liquid or a gas.
C. is incorrect because insulation is a property of
a material that makes it resistant to heat
transfer.
D. is incorrect because radiation is the transfer of
heat by electromagnetic waves and occurs
without objects being in contact with each
other.
Jeriah places two metal cubes in contact with each other.
Energy as heat flows from Cube A to Cube B.
What conclusion can you draw regarding Cube
A?
A. It is larger than Cube B.
B. It is cooler than Cube B.
C. It is smaller than Cube B.
D. It is warmer than Cube B.
√heck the answer
ANS: D
A. is incorrect because the direction of heat flow does
not depend on the relative sizes of the cubes.
B. is incorrect because energy as heat would flow
from Cube B to Cube A if Cube A is cooler than
Cube B.
C. is incorrect because the direction of heat flow does
not depend on the relative sizes of the cubes.
D. is correct because energy as heat flows from
warmer objects to cooler objects. If heat flows from
Cube A to Cube B, then Cube A must be warmer
than Cube B.
Kirby leaves a beaker of water at 80 ° C to stand
in a room with an air temperature of 20 ° C. He
measures the temperature of the water in the
beaker every five minutes.
At what temperature will the water
temperature stop decreasing?
A. 0 °C.
B. 20 °C.
C. 50 °C.
D. 80 °C.
√heck the answer
ANS: B
A. is incorrect because the temperature of the water will
decrease until it reaches the same temperature as the
air. It will not drop below the temperature of the air.
B. is correct because the temperature of the water will
decrease until it reaches the same temperature as the
air.
C. is incorrect because the temperature of the water will
decrease until it reaches the same temperature as the
air.
D. is incorrect because the temperature of the water will
decrease as heat energy flows from the water to the air.
Tran places a warm plate with a temperature of 60 °C
on a bench that is at a temperature of 25 °C. After an
hour, the plate and the bench are at the same
temperature.
Which of the following best describes what occurs during
the hour?
A. The temperature of the plate stays the same, while the
temperature of the bench increases to 60 °C.
B. The temperature of the bench stays the same, while
the temperature of the plate decreases to 25 °C.
C. The temperature of the plate and the bench both
decrease until they reach a temperature of 0 °C.
D. The temperature of the plate decreases to 30 °C, while
the temperature of the bench increases to 30 °C.
√heck the answer
ANS: D
A. is incorrect because heat energy will be transferred
from the warm plate to the cooler bench, so the
temperature of the plate would decrease.
B. is incorrect because heat energy will be transferred
from the warm plate to the cooler bench, so the
temperature of the bench would increase.
C. is incorrect because the temperature of the plate will
decrease until it reaches the same temperature as the
plate.
D. is correct because heat energy will be transferred from
the warm plate to the cooler bench. The plate will
become cooler, while the bench will become warmer.
Heat Transfer
In this interactive activity adapted from the Wisconsin
Online Resource Center, learn how heat can be
transferred in one of three ways: conduction, convection,
and radiation.