Chapter 24 Resource: Energy and Energy Resources

Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Name Date Class
Lab Preview
Directions: Answer these questions before you begin the Lab.
1. What materials are needed for this lab?
2. What will you investigate in this lab?
You probably have listened to music using speakers or headphones. Have you
ever considered how energy is transferred to get the energy from the radio or
CD player to your brain? What type of energy is needed to power the radio
or CD player? Where does this energy come from? How does that energy
become sound? How does the sound get to you? In this activity, the sound
from a radio or CD player is going to travel through a motor before entering
your body through your jaw instead of your ears.
Real-World Question
How can energy be transferred from a radio
or CD player to your brain?
Materials
radio or CD player
small electrical motor
headphone jack
Hearing with Your Jaw
Goals
■ Identify energy transfers and transformations.
■ Explain your observations using the law of
conservation of energy.
Conclude and Apply
1. Describe what you heard.
2. Identify the form of energy produced by the radio or CD player.
Procedure
1. Go to one of the places in the room with a
motor/radio assembly.
2. Turn on the radio or CD player so that you
hear the music.
3. Push the headphone jack into the headphone
plug on the radio or CD player.
4. Press the axle of the motor against the side
of your jaw.
Energy and Energy Resources 5
Hands-On Activities