LESSON
Cloze Activity
Name
Date
Electromagnetic Waves
Fill in the blanks.
energy
infrared rays
radio waves
field
magnetic
space
harmful
medical
visible light
Electromagnetic waves can travel through matter or
space
electric
. When an electric charge vibrates, its
field
also vibrates. Changes in the
electric field produce a corresponding change in the
magnetic
field. The range of electromagnetic waves
forms the electromagnetic spectrum.
The longest waves in the electromagnetic spectrum
are
radio waves
. Next come microwaves and then
infrared rays
. The light that people can see,
visible light
, falls in the middle of the spectrum.
The shorter electromagnetic waves have greater
and in large amounts are
harmful
to living things. However, these
electromagnetic waves also have
medical
uses.
For example, they are used to kill bacteria and viruses.
5-50
Unit 5 • Properties of Energy
Unit Resources
Use with Lesson 4
Electromagnetic Waves
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