1. Unit 5 Lesson 5 How Do We Use Electricity?
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2. 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.
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3. 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.
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4. 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?
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5. 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.
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6. 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.
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7. 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.
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8. 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.
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9. 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.
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