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Unit 5 Lesson 1 What Is Energy?
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Unit 5 Lesson 1 What Is Energy?
Florida Benchmarks
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• 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.
Unit 5 Lesson 1 What Is Energy?
Energy All Around
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• 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.
Unit 5 Lesson 1 What Is Energy?
The Ups and Downs of Energy
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• 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.
Unit 5 Lesson 1 What Is Energy?
The Ups and Downs of Energy
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• Energy can be stored as chemical energy.
• Potential energy can be changed to kinetic energy.
• Kinetic energy can be changed to potential energy.
Unit 5 Lesson 1 What Is Energy?
Loud, Soft, Hot, Cold
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• 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.
Unit 5 Lesson 1 What Is Energy?
Loud, Soft, Hot, Cold
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• 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.
Unit 5 Lesson 1 What Is Energy?
See a Sea of Energy
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• 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.
Unit 5 Lesson 1 What Is Energy?
See a Sea of Energy
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• Electrical energy is energy caused by the movement of electric charges.
• Electrical energy can change to other types of energy you can use.
Unit 5 Lesson 1 What Is Energy?
Energy in Machines and Food
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• Mechanical energy is the total energy of motion and position of an object.
• Mechanical energy = KE + PE
• Machines use mechanical energy to do work.
Unit 5 Lesson 1 What Is Energy?
Energy in Machines and Food
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• 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.
Unit 5 Lesson 1 What Is Energy?
Spotlight on Energy
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• Musicians and performers rely on different forms of energy to complete their shows.
• Potential, kinetic, chemical, light, heat, mechanical, and sound energies are used.