Sound and Light Wave Review Unit 4 Quiz

Clyde wants to make ear protectors for people who work around loud jet engines at Hartsfield Airport in Atlanta. Which of the following materials should he experiment with for the best results?

• a) a material that amplifies sound

• b) a material that absorbs sound

• c) a material that transmits sound

• d) a material that produces sound

Jesse walked into a large, dark room and yelled “Hello!” She heard a loud echo of the word almost immediately. Which of the following is a valid conclusion that Jesse could draw from her observations?

• She produced sound waves that reflected off of the walls of the room.

• She produced sound waves that created a sonic boom.

• She produced sound waves that destructively interfered with each other.

• She produced sound waves that demonstrated the Doppler effect.

Which statement best describes what happens to sound waves in the INNER ear?

• Loud sounds are made.

• Sound waves enter the ear and are channeled through the ear canal.

• Sound waves are amplified by the hammer, anvil, and stirrup.

• Sound vibrations are turned into electrical signals and sent to the brain by hair cells.

Which of the following waves that the lowest pitch?

• A

• B

• C

• D

The Doppler Effect is an observed change in the frequency of a sound, this is caused by?

• a)    When the brain gets confused about the frequencies that are interpreted.

• b)    When the sound barrier is broken.

• c)    When either the source of the sound or the listener is moving.

• d)    When the temperature of the air causes molecules to slow down in all directions.

Which of the following waves has the loudest sound?

• A

• B

• C

What kind of wave is a sound wave?

• Electromagnetic and Transverse

• Electromagnetic and Longitudinal

• Mechanical and Transverse

• Mechanical and Longitudinal

What is the relationship between the density of a medium and the speed of waves passing through it?

• The less dense a medium is the faster it will travel

• The denser a medium is the slower it will travel

• The denser a medium is the faster it will travel

• Density is not a property that affects speed

What is the relationship between the temperature of a medium and the speed of waves passing through it?

• The higher the temperature the faster it will travel

• The higher the temperature the slower it will travel

• The lower the temperature the faster it will travel

• Temperature is not a property that affects speed

Sound travels the fastest in a ...

• Vacuum

• Liquid

• Gas

• Solid