Heat and Heat Technology

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Heat and Heat Technology
Chapter 10
Preview
CRCT Preparation
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CRCT Preparation
Chapter 10
1. If an object made of each of these substances
was placed in a pot of boiling water, which
object would reach 100C most quickly? A lead B
iron C glass D wood
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Chapter 10
CRCT Preparation
1. If an object made of each of these substances
was placed in a pot of boiling water, which
object would reach 100C most quickly? A lead B
iron C glass D wood
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Chapter 10
CRCT Preparation
2. Which statement best explains how a
refrigerator works? A Thermal energy is
transferred from the room to the refrigerator
compartment and liquid refrigerant in the coils.
B Thermal energy from the liquid refrigerant in
the coils is transferred to the refrigerator
compartment. C Thermal energy from the
refrigerator compartment is transferred to the
liquid refrigerant in the coils. D Thermal energy
is transferred between the refrigerator
compartment and the liquid refrigerant in the
coils.
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Chapter 10
CRCT Preparation
2. Which statement best explains how a
refrigerator works? A Thermal energy is
transferred from the room to the refrigerator
compartment and liquid refrigerant in the coils.
B Thermal energy from the liquid refrigerant in
the coils is transferred to the refrigerator
compartment. C Thermal energy from the
refrigerator compartment is transferred to the
liquid refrigerant in the coils. D Thermal energy
is transferred between the refrigerator
compartment and the liquid refrigerant in the
coils.
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Chapter 10
CRCT Preparation
3. Which of the following sentences best
describes the process that occurs when liquid
water becomes ice? A Thermal energy is
transferred to the water, and its molecules stop
moving. B Thermal energy is transferred to the
water, and its molecules move more quickly. C
Thermal energy is transferred from the water, and
its molecules are held tightly together. D
Thermal energy is transferred from the water, and
its molecules break apart.
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Chapter 10
CRCT Preparation
3. Which of the following sentences best
describes the process that occurs when liquid
water becomes ice? A Thermal energy is
transferred to the water, and its molecules stop
moving. B Thermal energy is transferred to the
water, and its molecules move more quickly. C
Thermal energy is transferred from the water, and
its molecules are held tightly together. D
Thermal energy is transferred from the water, and
its molecules break apart.
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Chapter 10
CRCT Preparation
4. Which statement correctly describes how
thermal energy is transferred when Phoenix holds
a piece of ice in her hand? A Thermal energy is
transferred from her hand to the ice cube. B
Thermal energy is transferred back and forth
between her hand and the ice cube. C Thermal
energy is transferred from the ice cube to her
hand. D Thermal energy is not transferred between
her hand and the ice cube.
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Chapter 10
CRCT Preparation
4. Which statement correctly describes how
thermal energy is transferred when Phoenix holds
a piece of ice in her hand? A Thermal energy is
transferred from her hand to the ice cube. B
Thermal energy is transferred back and forth
between her hand and the ice cube. C Thermal
energy is transferred from the ice cube to her
hand. D Thermal energy is not transferred between
her hand and the ice cube.
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Chapter 10
CRCT Preparation
5. How do electromagnetic waves emitted by the
sun heat Earth? A by conduction B by convection C
by radiation D by insulation
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Chapter 10
CRCT Preparation
5. How do electromagnetic waves emitted by the
sun heat Earth? A by conduction B by convection C
by radiation D by insulation
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Chapter 10
CRCT Preparation
6. The diagram shows three closed jars that all
contain the same substance. Which of the
following statements is true?
A The particles in all three jars have the same
amount of thermal energy.
B The particles in jar 1 have the greatest
freedom of motion. C The particles in jar 2
cannot transfer heat by convection. D The
particles in jar 3 have the highest kinetic
energy.
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Chapter 10
CRCT Preparation
6. The diagram shows three closed jars that all
contain the same substance. Which of the
following statements is true?
A The particles in all three jars have the same
amount of thermal energy.
B The particles in jar 1 have the greatest
freedom of motion. C The particles in jar 2
cannot transfer heat by convection. D The
particles in jar 3 have the highest kinetic
energy.
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Chapter 10
CRCT Preparation
7. Which of the following statements best
describes particles of water at room
temperature? A They are held tightly together and
can only vibrate. B They are loosely connected
and can slide past each other. C They move about
freely and are far apart from each other. D They
have no attractions between them and do not move.
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Chapter 10
CRCT Preparation
7. Which of the following statements best
describes particles of water at room
temperature? A They are held tightly together and
can only vibrate. B They are loosely connected
and can slide past each other. C They move about
freely and are far apart from each other. D They
have no attractions between them and do not move.
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Chapter 10
CRCT Preparation
8. Which of the following is an example of
thermal expansion? A water increasing in volume
as it freezes in an ice cube tray B a jar lid
loosening when it is placed under running hot
water C hot soup cooling to room temperature D a
balloon getting larger as more air is pumped into
it
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Chapter 10
CRCT Preparation
8. Which of the following is an example of
thermal expansion? A water increasing in volume
as it freezes in an ice cube tray B a jar lid
loosening when it is placed under running hot
water C hot soup cooling to room temperature D a
balloon getting larger as more air is pumped into
it
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Chapter 10
CRCT Preparation
9. As Jackie walks along the beach on Tybee
Island, the hot sand burns her feet. When she
lies on a blanket in the sand, Jackie gradually
becomes warm. To cool off, Jackie goes swimming
in the ocean. Describe three ways that Jackies
experiences illustrate thermal energy transfer.
State the type of energy transfer that is not
illustrated.
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Chapter 10
CRCT Preparation
9. Answer - Full-credit answers should include
three of the following transfers of thermal
energy The sun transfers energy to the beach
sand, beach blanket, and Jackie through
radiation. The sand transfers energy to
Jackies feet and the beach blanket through
conduction. The beach blanket transfers energy
to Jackie through conduction. As Jackie swims
in the ocean, the heat from her body is
transferred to the ocean water through
conduction. This causes Jackie to feel cooler.
Convection is the type of thermal energy transfer
that is not illustrated by Jackies experiences.
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Chapter 10
CRCT Preparation
10. Gordon places a metal spoon into a mug of
hot cocoa. Explain why the spoon is warm after a
few minutes.
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Chapter 10
CRCT Preparation
10. Answer Thermal energy is transferred from
the hot cocoa to the metal spoon. The particles
in the hot cocoa collide with the particles in
the spoon. These collisions raise the kinetic
energy of the particles in the spoon while
lowering the kinetic energy of the particles in
the hot cocoa. Eventually, the kinetic energy of
all the particles in both objects will be the
same, and the temperature of the spoon will be
the same as the temperature of the beverage.