Energy Transformations
Lesson 2
Energy Transformations
Scan Lesson 2 in your book. Write three questions you have about energy transformations in your Science Journal. Try to answer your questions as you read.
Identify another term for “energy changing form.”
Changes Between Forms of Energy I found this on page
.
Changes Between Kinetic and Potential Energy I found this on page
.
Describe how energy changes as a ball is thrown in the air. Indicate the relative amounts of potential and kinetic energy at each position. Position C
Position B
Position D
Position E
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Position A
Position
Kinetic Energy
Potential Energy
A
B
C
D
E
I found this on page
.
Indicate the terms that will make the equation correct. Total energy =
energy +
energy
Energy and Energy Resources
49
Lesson 2 | Energy Transformations (continued)
The Law of Conservation of Energy I found this on page
Organize information about the law of conservation of energy.
. Law of Conservation of Energy
energy cannot be
I found this on page
.
I found this on page
.
energy can be
Define friction.
Sequence the events that occur as kinetic energy is changed to thermal energy by friction.
an example of
.
The boy applies his brake pad. The pad rubs against the surface of the path.
The boy starts to slow as between the pad and the surface of the path
I found this on page
50
.
Energy and Energy Resources
changes
energy
into
energy.
Identify one way to reduce friction.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
A boy in-line skates on a hard-surface pathway. This is
Lesson 2 | Energy Transformations (continued)
I found this on page
.
Summarize the change in energy as the boy who was in-line skating slowed down.
1. When the boy was skating, kinetic energy was
, .
and thermal energy was
2. As the boy applied his brake pad, kinetic energy was and thermal energy was
.
3. When the boy stopped, kinetic energy was
, .
and thermal energy was
4. At all times, total energy = energy +
Identify how energy changed form so that it could be used in each
Using Energy I found this on page
energy.
.
example. A space heater warms a room.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
You eat dinner.
A radio plays.
I found this on page
.
Explain how waste energy is produced. A lightbulb converts some electric energy to
and
Explain how you know that not all of the electric energy used by a television is converted to sound and light.
Energy and Energy Resources
51
Energy Transformations
Scan Lesson 2 in your book. Write three questions you have about energy transformations in your Science Journal. Try to answer your questions as you read.
Identify another term for “energy changing form.”
Changes Between Forms of Energy I found this on page
.
Changes Between Kinetic and Potential Energy I found this on page
.
Describe how energy changes as a ball is thrown in the air. Indicate the relative amounts of potential and kinetic energy at each position. Position C
Position B
Position D
Position E
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Position A
Position
Kinetic Energy
Potential Energy
A
B
C
D
E
I found this on page
.
Indicate the terms that will make the equation correct. Total energy =
energy +
energy
Energy and Energy Resources
49
Lesson 2 | Energy Transformations (continued)
The Law of Conservation of Energy I found this on page
Organize information about the law of conservation of energy.
. Law of Conservation of Energy
energy cannot be
I found this on page
.
I found this on page
.
energy can be
Define friction.
Sequence the events that occur as kinetic energy is changed to thermal energy by friction.
an example of
.
The boy applies his brake pad. The pad rubs against the surface of the path.
The boy starts to slow as between the pad and the surface of the path
I found this on page
50
.
Energy and Energy Resources
changes
energy
into
energy.
Identify one way to reduce friction.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
A boy in-line skates on a hard-surface pathway. This is
Lesson 2 | Energy Transformations (continued)
I found this on page
.
Summarize the change in energy as the boy who was in-line skating slowed down.
1. When the boy was skating, kinetic energy was
, .
and thermal energy was
2. As the boy applied his brake pad, kinetic energy was and thermal energy was
.
3. When the boy stopped, kinetic energy was
, .
and thermal energy was
4. At all times, total energy = energy +
Identify how energy changed form so that it could be used in each
Using Energy I found this on page
energy.
.
example. A space heater warms a room.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
You eat dinner.
A radio plays.
I found this on page
.
Explain how waste energy is produced. A lightbulb converts some electric energy to
and
Explain how you know that not all of the electric energy used by a television is converted to sound and light.
Energy and Energy Resources
51
