Chapter 7 Review JEOPARDY!

Electromagnetic Waves & Light

Round 1N-ergy Which Wave

is that?What We See Light Tricks The Waves

Don’t Stop!

10 10 10 10 10

20 20 20 20 20

30 30 30 30 30

40 40 40 40 40

50 50 50 50 50

Round 2

N-ergy– 10 points Energy that is transferred as waves with

both electrical and magnetic properties is called _______________ ________.

Electromagnetic energy

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N-ergy– 20 points In a vacuum, all electromagnetic waves

have the same ________. Speed

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N-ergy– 30 points Waves that transfer up-and-down vibrations

(with crests and troughs) are called _____ waves.

Transverse

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N-ergy– 40 points Electromagnetic waves are different from

mechanical waves because they can… Travel in a vacuum (do not need a medium)

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N-ergy– 50 points Light is _____________ when it passes

from one medium into another at an angle. Refracted (causing it to bend)

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Which Wave is That?– 10 points Chemicals used to give color to materials

are called __________. pigments

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Which Wave is That?– 20 points The EM waves found between visible light

and x-rays on the spectrum are _________. ultraviolet

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Which Wave is That?– 30 points The wavelengths of the em spectrum that

are associated with heat and fall just before visible light in the spectrum.

Infrared

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Which Wave is That?– 40 points Radar uses reflected ____________ to

measure speed. microwaves

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Which Wave is That?– 50 points The EM waves with the highest frequency

(and therefore the highest energy) are _______

Gamma rays

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What We See – 10 points A wave is really just a disturbance that

transfers ___________ from place to place. energy

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What we See – 20 points Rate the phases of matter in order from

where sound travels fastest to where sound travels slowest.

Solids, liquids, gases

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What We See – 30 points The frequency of a wave is measured in

units called ________ Hertz (Hz)

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What We See– 40 points The color a red apple will appear if you

shine blue light on it is ________. Black (there will be no red wavelengths to

reflect off the apple and back to your eye… the blue wavelength gets absorbed by the apple)

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What We See– 50 points The color you will see if you look at your

blue t-shirt through a red filter is ______. Black (blue cannot pass through the red

filter, so your eye does not receive any wavelengths of color and shirt looks black)

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Wave Tricks– 10 points How high or low a sound seems to a

person is the sound’s ____________ pitch

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Light Tricks– 20 points Interaction between two waves that meet is

called ____________, and it can be constructive or destructive.

Interference

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Light Tricks– 30 points When two waves meet to make a wave with

a smaller amplitude, the type of interference is ___________.

destructive

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Light Tricks– 40 points Sound waves travel through a medium as

_______________ waves. (the type of mechanical wave)

Longitudinal

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Light Tricks– 50 points The pitch of a sound depends on the

wave’s ____________. (The higher the pitch of the sound, the higher this must be.)

Frequency

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The Waves Don’t Stop! – 10 points Mechanical waves are created when a

source of energy causes a medium to _____________.

Vibrate

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The Waves Don’t Stop!– 20 points The distance between two crests of a wave

would be called its ____________. Wavelength

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The Waves Don’t Stop!– 30 points The amplitude of a sound wave helps

determine how _________ the sound will be.

loud

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The Waves Don’t Stop!– 40 points Bats & dolphins have the ability to locate

food using a skill called ___________. Echolocation

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The Waves Don’t Stop!– 50 points Explain the following: (1) Why does sound travel

faster in air that is 30o than air that is 20o? (2) Why would Chuck Yeager have chosen a high altitude to break the sound barrier?

(1) molecules already moving faster, so they transfer energy faster (2) high altitude=low temp=easier to break speed of sound since sound would travel slower there

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