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Unit 5 Lesson 1 What Is Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Florida Benchmarks
• SC.5.P.10.1 Investigate and describe some basic
forms of energy, including light, heat, sound,
electrical, chemical, and mechanical.
• SC.5.P.10.2 Investigate and explain that energy
has the ability to cause motion or create change.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Energy All Around
• Energy is the ability to cause changes in matter.
• Energy can transform, or change, from one form
into another.
• Energy is never used up. It just changes form.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
The Ups and Downs of Energy
• Potential energy (PE) is the energy an object
has because of its position or condition.
• Kinetic energy (KE) is the energy an object has
because of its motion.
• PE is stored energy. KE is energy of motion.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
The Ups and Downs of Energy
• Energy can be stored as chemical energy.
• Potential energy can be changed to kinetic energy.
• Kinetic energy can be changed to potential
energy.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Loud, Soft, Hot, Cold
• Sound energy is a form of energy that is carried
as waves in vibrating matter.
• Sound energy is a type of kinetic energy, because
particles of matter are moving.
• Sound energy is the cause of all the sounds you
hear.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Loud, Soft, Hot, Cold
• Thermal energy is the total kinetic energy of the
particles that make up a substance.
• You can sense thermal energy as temperature.
• The more thermal energy an object has, the
greater its temperature.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
See a Sea of Energy
• Light energy is a form of energy that can travel
through space.
• Light energy travels as waves.
• Some objects give off light. Other objects reflect
light.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
See a Sea of Energy
• Electrical energy is energy caused by the
movement of electric charges.
• Electrical energy can change to other types of
energy you can use.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Energy in Machines and Food
• Mechanical energy is the total energy of motion
and position of an object.
• Mechanical energy = KE + PE
• Machines use mechanical energy to do work.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Energy in Machines and Food
• Food contains energy.
• Chemical energy is energy that is stored in
matter and that can be released by a chemical
reaction.
• When your body breaks down food, potential
chemical energy is released, producing heat.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is Energy?
Spotlight on Energy
• Musicians and performers rely on different forms
of energy to complete their shows.
• Potential, kinetic, chemical, light, heat,
mechanical, and sound energies are used.
Copyright © Houghton Mifflin Harcourt Publishing Company
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