Your teacher's name after spring break will be

• Miss Christensen
• Mrs. Christensen
• Miss Callahan
• Mrs. Callahan

What is a vacuum? 

• A space with only air in it
• A space with NO matter at all present
• A machine you use to do your chores

Frequency is a measure of...

• length of the wave
• height of the wave
• number of waves a second
• number of waves an hour

Wave with the longest wavelength

• microwave
• radio
• gamma
• visible light

The EM wave with frequency higher than infrared and lower than UV.

• radio
• visible light
• xray
• gamma

4 is 

• radio
• UV 
• Visible Light
• X-ray

7 is 

• Radio
• UV
• Infrared
• Gamma

When the wavelength increases the frequency will

• increase
• decrease

EM waves  

• Must travel through a vacuum
• Can travel through a medium or a vacuum
• Are the same type of wave as mechanical waves
• Can only travel through a vacuum

Visible light is 

• radiation
• light
• a way to transfer energy
• all of these