A bird song has a_______ pitch and frequency. It has_________ vibrations per second.

Sound is measured in _____.

Sound above ___ _____ is harmful to your ears.

The high point of a wave is called a ______.

The low point of a wave is called a _______.

Look at the blue bracket in the picture. What does it show?

What is the amount of energy in a wave called?

Sound waves travel faster through solids and gases.

Sound vibrations travel in compression waves. 

As the wave moves, molecules of air are composed, or pushed together and then put back together.

The taller the wave, the larger the amplitude and the more energy the wave carries .

Light waves are_ _ _ _ _ _ _ waves.

When an opaque object blocks light, _ _ _ _ _ _ _ forms

The electromagnetic spectrum is organized by…….

The longest wavelengths are radio waves

The shortest wavelength are gamma radios.

A laser has one _ _ _ _ _ _ _ _ _.

Lasers are _ _ _ _ in only one direction.

Wireless phones use _ _ _ _ _ _ waves

_ _ _ _ _ materials don't let light pass through.

_ _ _ _ _ materials let light pass through .

Bouncing of light is….

When a material absorbs light it…..

Light behaves in different ways depending on the type of matter it meets.

A green shirt is really anything but…

The speed of light changes depending on the material it is passing through; the change causes bending, or diffraction.