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Vocabulary A Vocabulary B Characteristics of Waves Interaction of Waves Essential Questions

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30 Points 30 Points 30 Points 45 Points

40 Points 40 Points 40 Points 60 Points

50 Points 50 Points 50 Points 75 Points

Property of Waves

What type of interaction occurs

when a wave bounces back after striking a barrier?

Reflection

When 2 or more waves overlap, the result is known as

what?

Interference

The material through which a wave travels is

called a ___________.

Medium

When two waves combine and the waves CRESTS

overlap, what type of interference

occurs?

Constructive Interference

The vibrations that matched the natural

frequency of the Tacoma bridge,

causing it to collapse, is an example of ____________.

Resonance

An incoming wave interacts with a

reflected wave and the combined wave

appears to be standing still. This is an example

of what?

Standing Wave

Being able to hear sounds from the hall,

even though you cannot see where the

noise is coming from is an example of what?

Diffraction

The law which states that the

angle of incidence equals the angle of reflection is known

as ___________.

The Law of Reflection

What parts of 2 incoming waves

combine to create destructive

interference?

A crest and a trough.

What property of the wave is shown

at A?

A

B

Wavelength

What are the four properties of

waves?

Amplitude, Wavelength,

Frequency, and Speed

What is the name of the unit which

measures the frequency of a

wave?

Hertz

The wavelength of a given wave is 6 m. The frequency of the same

wave is 1/3 Hz. What is the speed of this wave?

INCLUDE 3 STEPS IN YOUR CALCULATION TO RECEIVE

CREDIT

2 meters / second

What 2 ways can you measure the wavelength of a

longitudinal wave?

1. Compression to Compression

2. Rarefaction to Rarefaction

Mac and Josh stand 7 meters apart and make a transverse

wave with a piece of rope. Their wave has a vertical distance of 18 cm from trough to crest, a

frequency of 2.6 Hz and a horizontal distance from crest to nearest trough of 30 cm. What

is the amplitude and wavelength?

Amplitude = 9cm

Wavelength = 60 cm

A wave transfers _______, but

does not transfer ___________.

Energy; Particles / Matter

A ______ is a repeated back

and forth OR up and down motion.

Vibration

Which wave has the highest

energy?

Wave B has the highest energy

because it has the highest amplitude.

The section of a longitudinal wave where the particles are spread apart is

called a(n) ________.

Rarefaction

What kind of waves requires a medium through

which to pass through?

Mechanical

What interaction of waves occurs when a wave hits a surface through which it cannot pass and bounces back?

Reflection

What occurs when a wave enters a new

medium at an angle?

Refraction

The following waves are moving toward each other. What will be the amplitude of the combined wave when

the 2 crests meet?

35 cm

Name the two types of interference and

what happens to the amplitude of the wave in each

case.

Constructive Interference –

amplitude gets bigger

Destructive Interference –

amplitude gets smaller

Explain what happens to allow

you to see the moon at night.

The sun’s rays REFLECT off

the moon’s surface.

Explain the difference between

transverse and longitudinal waves

with respect to particle movement.

In transverse waves the particles move

perpendicular to the wave movement and in longitudinal waves the particles move parallel to the wave movement.

Explain the difference between

a tsunami and a regular ocean

wave.

Regular Ocean Wave – smaller amplitude and shorter wavelengths; carry less energy

Tsunami Waves – larger amplitude and longer

wavelengths; carry more energy

A wave has a frequency of 330 HZ

and a speed of 660 m/s. What is the wave’s

wavelength?NOTE: INCLUDE 3 STEPS IN YOUR

CALCULATION TO RECEIVE CREDIT

WS = WL x F

660m/s = WL x 330 Hz

WL= 660/330 = 2 m

Based on the table below, what general conclusion can you

make about the speed of sound in solids, liquids, and gases?

Medium Speed (m/s)Air at 0°C 331

Air at 20°C 344Brick 3,628Steel 5,064Water 1,480

Sounds travel fastest through solids or sounds travel slowest through gases.

How are wavelength,

frequency, and energy all related?

Longer wavelength = less frequency = less

energy

Shorter wavelength = greater frequency=

more energy

Make your wager

FINAL JEOPARDY CATEGORY

Interaction of Waves

If you push a shopping cart that has a stiff or damaged wheel, it is

difficult to steer the cart in a straight line. Explain

how this is similar to refraction of a wave as it

enters a new medium.

The stiff wheel travels more slowly than the wheel on the other side, so the shopping cart will follow a curved

path, similar to a wave that changes speed when it enters a new medium at an angle.