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What does a car need to move?
The car needs gasoline or petrol to move to give it
energy. The car won’t go anywhere if it runs out of
gas.
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SO….. How do you think a human
being would his/her energy from?
They eat
nuts and
fruits to
have more
energy.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
What Is Energy?
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• Energy is the ability to cause change in matter.
• Everything that moves has energy. • Energy can be stored.Example :People and animals get energy from the foods they eat. Cars get energy from gasoline.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
What Is Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
What Is Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Kinetic vs Potential energy
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Unit 9 Lesson 1 What Are Some Forms of Energy?
What are different types of energy?
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• Kinetic energy is the energy of motion(movement).
• A boy bouncing on a pogo stick has kinetic energy.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
What are different types of energy?
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• Potential energy is the energy something has because of its position or condition.
• A rock at the top of a hill has potential energy.
• The higher the object the more potential energy it has.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Match each picture to its type of energy:
Copyright © Houghton Mifflin Harcourt Publishing Company
Kinetic energy
Potential energy
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Get Moving!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Mechanical energy is the total potential energy and kinetic energy of an object.
• The mechanical energy of a moving roller-coaster car is the sum of its potential energy and its kinetic energy.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Get Moving!
Copyright © Houghton Mifflin Harcourt Publishing Company
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What types of energy can you see
here?
Light energy
Sound energy
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What types of energy can you see
here?
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Unit 9 Lesson 1 What Are Some Forms of Energy?
•Light energy:
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• Light is a form of energy that can travel through space.
• We use light to see.
• Plants use light energy from the sun to make food.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
•Sound energy:
Copyright © Houghton Mifflin Harcourt Publishing Company
• Sound is another form of energy. It is produced by
an object vibrating.
• Pitch describes how high or low a sound is.
• Loud sounds have more energy than quiet sounds
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Unit 9 Lesson 1 What Are Some Forms of Energy?
•Sound energy:
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Chemical energy:
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• Chemical energy is the energy that can be released by a chemical change.
• Chemical energy in foods give you energy.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Electrical energy:
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• Electrical energy is the energy that comes from electric current.
• Computers and televisions are examples of things that use electrical energy.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
• Electrical energy usually is generated by the chemical energy released from chemical reactions taking place inside the battery.
• The sun and wind also are used to generate electrical energy.
Electrical energy:
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Energy Can Change Forms
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• Energy can change from one form to another.
• Electrical energy changes to light energy when you turn on a light switch.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Energy Can Change Forms
Copyright © Houghton Mifflin Harcourt Publishing Company
• Chemical energy in gasoline changes to mechanical energy when a driver presses the gas pedal in a car.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Energy Can Change Forms
Copyright © Houghton Mifflin Harcourt Publishing Company
• Chemical energy changes to light energy in a glow stick.
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 9 Lesson 1 What Are Some Forms of Energy?
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