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Unit 6 Lesson 1 Energy Conversion and
Conservation
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Unit 6 Lesson 1 Energy Conversion and Conservation
Florida Benchmarks
• SC.7.P.11.2 Investigate and describe the
transformation of energy from one form to
another.
• SC.7.P.11.3 Cite evidence to explain that energy
cannot be created nor destroyed, only changed
from one form to another.
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Unit 6 Lesson 1 Energy Conversion and Conservation
Florida Benchmarks
• MA.6.A.3.6 Construct and analyze tables, graphs,
and equations to describe linear functions and
other simple relations using both common
language and algebraic notation.
• LA.7.4.2.2 The student will record information
(e.g., observations, notes, lists, charts, legends)
related to a topic, including visual aids to organize
and record information, as appropriate, and
attribute sources of information.
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Unit 6 Lesson 1 Energy Conversion and Conservation
Perfect Form
What are some forms of energy?
• Energy can come in many forms.
• Mechanical energy is the sum of an object’s
kinetic energy and potential energy.
• Sound energy results from the vibration of
particles. This is why sound cannot travel through
empty space.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 Energy Conversion and Conservation
What are some forms of energy?
• Electromagnetic energy is transmitted in the form
of electromagnetic waves.
• Electromagnetic waves are produced by the
vibration of electrically charged particles.
• Electromagnetic waves can travel through empty
space.
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Unit 6 Lesson 1 Energy Conversion and Conservation
What are some forms of energy?
• Chemical energy is the energy stored in chemical
bonds that hold chemical compounds together.
• Thermal energy is the energy an object has due to
the motion of its molecules.
• The faster the molecules move, the more thermal
energy the object has.
• Heat is the transfer of thermal energy.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 Energy Conversion and Conservation
What are some forms of energy?
• Nuclear energy comes from the nucleus of an
atom.
• When an atom’s nucleus breaks apart, or when
the nuclei of two atoms join together, energy is
released.
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Unit 6 Lesson 1 Energy Conversion and Conservation
Transformers
What is an energy transformation?
• An energy transformation takes place when
energy changes from one form into another form.
• Any form of energy can change into any other
form of energy.
• Often one form of energy can change into two or
more other forms.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 Energy Conversion and Conservation
What is an energy transformation?
• In a flashlight, chemical energy is transformed
into electrical energy.
• The electrical energy is then transformed into light
and thermal energy.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 Energy Conversion and Conservation
Is energy conserved?
• A group of objects that transfers energy only to
one another is called a closed system.
• In a closed system, all the energy is conserved.
• The law of conservation of energy states that
energy cannot be created or destroyed. It can
only change forms.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 6 Lesson 1 Energy Conversion and Conservation
Efficiency Expert!
How is efficiency measured?
• When energy is transformed from one form to
another form, not all of it is turned into useful
energy.
• Usually, some energy is also transformed into
thermal energy.
• Efficiency is the ratio of useful output energy to
input energy.
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Unit 6 Lesson 1 Energy Conversion and Conservation
How is efficiency measured?
• Energy efficiency is highly desirable because it
means as much energy as possible is converted to
useful forms.
• Efficiency is calculated by dividing energy out by
energy in and then multiplying by 100 percent.
• If less energy is wasted, then less energy is
needed to operate a machine.
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