Sound and Light Waves

_____?_____ materials allow SOME light waves to pass through, but not in a straight path.

• Opaque

• Transparent

• Translucent

_____?______ materials do not allow ANY light waves to pass through.

• Opaque

• Transparent

• Translucent

_____?_____ materials allow ALL light waves to pass through easily.

• Opaque

• Transparent

• Translucent

The volume of a sound corresponds to the

• amplitude

• frequency

• wavelength

The pitch of a sound corresponds to the

• amplitude

• frequency

• crest

Between waves B and D, which is louder?

• Wave B

• Wave D

Between waves F and G, which is lower in pitch?

• Wave F

• Wave G

When you yell in a canyon, you hear an echo of your voice. Why is this?

• The sound waves are absorbed by the walls of the mountains.

• The sound waves are reflected by the walls of the mountians.

• The sound waves are transmitted through the walls of the mountains.

In movie theaters, they build the walls between theaters with materials that block the sounds from traveling to the next theater. What material would be best?

• Materials that transmit sound waves.

• Materials that absorb sound waves.

Electromagnetic waves ________ a medium to travel through, while mechanical waves ___________ a medium.

• do not need/need

• need/do not need