Waves Unit Review

Waves Unit Review

Wave Vocabulary

• Crest - high point

• Trough - low point

• Amplitude - height of wave

• Wavelength - distance between crests/troughs

• Frequency - number of waves in given amount of time

Multiple Select

Choose all of the statements that are true about the characteristics of waves.  

• As frequency increases, wavelength decreases.

• The higher the amplitude, the louder a sound is.  

• If a wave interferes with another wave, the result is always a bigger wave than the original waves.  

• As amplitude increases, wavelength decreases.  

Multiple Choice

What is another name for wave height (distance from the resting point to the crest)? 

• wavelength

• amplitude

• frequency

• crest

Multiple Choice

Which wave in this diagram has the greatest frequency?

• 1

• 2

• 3

• 4

Multiple Choice

Which letter represents a wavelength?

• A

• B

• D

• E

Multiple Choice

Which of these graphs indicate a wave that has more energy?

• The top one because the amplitude is a fraction.

• The bottom one because the amplitude is higher.

• They both have the same amount of energy because they have the same wavelength.

• They both have the same amount of energy because they have the same frequency.

• Particles move parallel to the disturbance

• Sound waves are an example

• Looks like a slinky

Longitudinal

• Particles move perpendicular to the disturbance (opposite direction)

• Light waves are an example

• Looks like a roller coaster

Transverse

Transverse vs Longitudinal

Multiple Choice

In a longitudinal wave, how do the individual particles move?

• back and forth 90 degrees from the direction of the wave (perpendicular)

• along the wave the same speed as the wave travels

• back and forth in the same direction as the wave (parallel)

Multiple Choice

What kind of wave is this modeling?

• Transverse

• Longitudinal

Multiple Choice

Generally speaking, sound travels fastest through which type of medium?

• liquids

• solids

• gasses

Multiple Select

Which of these are advantages of using a digital signal instead of an analog signal?

Select all that are correct

• infinite data values

• easier to transport

• processing is easy

• better security

Refraction is the change in direction of a wave that occurs as the wave changes speed when moving form one medium to another

Refraction

Reflection is the bouncing of a wave off a surface

Reflection

Reflection or Refraction?

Multiple Choice

Why does this straw look like it is in two pieces?  

• because there are two straws, one of them is taped to the top of the cup, the other is in the water

• because the light is bending, or refracting, as it goes into the water from the air, causing us to see it differently

• because the light is reflecting, or bouncing off of the water, causing another straw to appear

• because the straw is broken 

Multiple Choice

An echo is when a sound wave bounces off of something and goes back to the sound maker.  Bats use it to know where to fly and fishermen use it find fish under water.  What type of wave interaction is an echo? 

• refraction

• diffusion

• reflection

• Transverse wave

• Can travel through a vacuum

• Example is ultraviolet

• Faster moving wave

• Has many frequencies on electromagnetic spectrum

Light Waves

• Longitudinal (compression) wave

• Must travel through a medium

• An example is music

• Slower moving wave

• Age affects the ear's ability to hear high/low vibrations

Sound Waves

Sound vs. Light

Multiple Choice

Use the chart to answer the question.

List these substances by how fast sound travels through them, from SLOWEST to FASTEST.

steel, air, sea water, glass

• steel, air, sea water, glass

• air, sea water, glass, steel

• air, glass, sea water, steel

• sea water, glass, air, steel