Unit 5 Lesson 5 How Do We Use Electricity? Copyright © Houghton Mifflin Harcourt Publishing Company 1

Unit 5 Lesson 5 How Do We Use Electricity? Florida Benchmark SC.5.P.10.4 Investigate and explain that electrical energy can be transformed into heat, light, and sound energy, as well as the energy of motion. Copyright © Houghton Mifflin Harcourt Publishing Company 2

Electricity Has Many Uses Unit 5 Lesson 5 How Do We Use Electricity? Electricity Has Many Uses Your life would change if there was no electricity. Electrical appliances make life easier. The electric motor in many appliances is a device that converts electrical energy into mechanical energy. Copyright © Houghton Mifflin Harcourt Publishing Company 3

Electricity Has Many Uses Unit 5 Lesson 5 How Do We Use Electricity? Electricity Has Many Uses What items in this picture have been replaced with objects that run on electric motors? Copyright © Houghton Mifflin Harcourt Publishing Company 4

Unit 5 Lesson 5 How Do We Use Electricity? Electromagnets Moving a magnet and a wire near each other produces an electric current. A device in which current produces magnetism is called an electromagnet. Wrapping a coil of current-carrying wire around an iron nail makes the nail a magnet. Copyright © Houghton Mifflin Harcourt Publishing Company 5

Conserving Electricity Unit 5 Lesson 5 How Do We Use Electricity? Conserving Electricity Energy stations may use water, coal, or atoms to produce electricity. Wind turbines can generate electricity. In a hydroelectric dam, the mechanical energy of falling water can be converted to electrical energy. Copyright © Houghton Mifflin Harcourt Publishing Company 6

Conserving Electricity Unit 5 Lesson 5 How Do We Use Electricity? Conserving Electricity Explain how mechanical energy is changed into electrical energy at this hydroelectric dam. Copyright © Houghton Mifflin Harcourt Publishing Company 7

Conserving Electricity Unit 5 Lesson 5 How Do We Use Electricity? Conserving Electricity A device that converts kinetic energy into electricity is called a generator. Power plants use generators to produce electricity. Copyright © Houghton Mifflin Harcourt Publishing Company 8

Conserving Electricity Unit 5 Lesson 5 How Do We Use Electricity? Conserving Electricity Renewable resources are resources that will never run out. Sunlight and falling water are examples. Coal is a limited resource. It will eventually run out. Conserving electricity helps conserve resources that will eventually run out. Copyright © Houghton Mifflin Harcourt Publishing Company 9