Unit 10 Lesson 5 How Do We Use Electricity?

A light bulb converts electrical energy into which of the following?

• light only

• light and motion

• heat and light

• heat only

Many appliances in your home and school use electrical energy. Which of these appliances is intended to convert electrical energy into sound energy?

• printer

• refrigerator

• electric fan

• radio

The illustration below shows one kind of generating station that uses coal to produce electrical power.

Which kind of energy conversion occurs in the generator?

• heat energy into electrical energy

• energy of motion into electrical energy

• electrical energy into energy of motion

• electrical energy into heat energy and energy of motion

This illustration shows some of the parts of an electric power grid.

At which part of this grid is electrical energy produced from other types of energy?

• substation

• distribution line

• transmission lines

• generating station

The picture below shows a device made of a battery, a nail, and a long piece of copper wire. It converts electrical energy into a different form of energy.

Which term below describes the device in the illustration?

• electric switch

• electromagnet

• electric motor

• electric generator

Which of these generating stations uses a renewable source of energy?

• coal plant

• nuclear power plant

• natural gas generator

• hydroelectric generator

What is the name for a machine that changes electrical energy into energy of motion?

• electric switch

• electromagnet

• electric motor

• electric generator

How are a generator and an electromagnet alike? How are they different?