Sound and Light Exam Review

How do sound waves travel?

• Sound transforms waves into different frequencies.

• Sound causes the air near it to vibrate inwards.

• Sound waves radiate outward from a central point.

What part of the electromagnetic spectrum can we see?

• visible light

• gamma rays

• radio waves

Which statements correctly describe light? (Select 3.)

• Light curves around corners or obstructions.

• Light can be reflected or refracted.

• Light behaves in a predictable way.

• Light travels in a straight line.

Which statements correctly describe sound? (Select 3.)

• Sound waves are compression waves that transfer energy in molecules.

• Sound waves are compression waves that transfer energy in molecules.

• Sound waves behave in predictable ways.

• All sound can be heard by human ears.

How are sound waves similar to light waves?

• Sound waves and light are both compression waves.

• Sound and light are forms of energy that travel in waves.

• Sound waves and light are both compression waves.

• Sound waves and light are both electromagnetic waves.

What are you doing when you are making sound?

• You are causing a medium to vibrate.

• You are causing the air pressure to drop.

• You are causing photons to vibrate.

What is it called when a wave passes through different mediums and the wave bends?

• rarefraction

• reflection

• refraction

What can you infer by looking at the electromagnetic spectrum (see image)?

• Infrared waves carry the most energy.

• Radio waves and x-rays are the same.

• Light travels as waves and can be measured.

Red light waves have a longer wavelength than green light waves. What can you conclude from this?

• Green light waves have the same frequency as red ones.

• Green light waves have a higher frequency than red ones.

• Green light waves have a smaller frequency than red ones.

Why do you see lightning before you hear the thunder it makes?

• The rain in the air slows the sound waves down.

• Light travels faster than sound.

• The thunder has to reflect off the ground first.