The Sun's Spectrum Review

How are different types of radiation arranged along the electromagnetic spectrum?

• By how fast they travel

• By their sources

• By the amount of energy they carry

• by how radioactive they are

What is the difference between a wave and a particle?

• A particle is a discrete unity of energy; a wave is a continuous flow of energy

• a wave carries energy; a particle carries light

• a wave moves at the speed of light; a particle can move at a range of speeds

• a wave carries electricity; a particle carries magnetic charge

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Place the following types of EM radiation in order, from lowest energy to highest energy:

A) Visible light

B) Gamma ray

C) Radio waves

• A, B, C

• C, A, B

• B, C, A

• C, B, A

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Which of the following transmits information using microwaves?

• 
• 
• 
• 

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Astronomers often scan the sky using devices called radio telescopes. What can you conclude about these devices?

• they send radio broadcasts out to distant stars and planets

• they pick up the radio waves emitted by stars

• they are less powerful than optical telescpes

• they can detect ultraviolet radiation

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Tim mentions that infrared radiation can be used to take special pictures called thermographs. "Graph" means "image." What can you infer about the prefix "thermo?"

• it means "light"

• it means "energy"

• it means "heat"

• it means "radio"

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What might happen if the ozone layer did not block the sun's ultraviolet rays?

• Humans would be able to see int he ultraviolet range of the EM spectrum

• Devices that use electromagnetic radiation would no longer work

• the surface of the earth would be much hotter

• rates of skin cancer would skyrocket

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Which word best describes gamma rays?

• weak

• destructive

• visible

• harmless

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What do all forms of electromagnetic radiation have in common?

• their strength

• their speed

• their wavelength

• their frequence

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What produces electromagnetic radiation?

• electrons changing energy levels

• electrons bonding with other atoms

• electrons leaving the atomic nucleus

• electrons becoming protons or neutrons

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