Astronomy Quiz 09

Because of the Doppler Effect, as a siren approaches you, its pitch will:

• increase as the wavelength increases.

• increase as the wavelength decreases.

• decrease as the wavelength increases.

• decrease as the wavelength decreases.

Answer explanation

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NGSS.HS-PS4-1

What causes the Doppler Effect in sound or light?

• The wavelength changes as objects change temperature.

• Objects appear closer or farther away as they move.

• Objects are heard or seen more easily when they are closer.

• The wave frequency changes as objects move.

Answer explanation

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NGSS.HS-PS4-1

NGSS.HS-PS4-3

Light from another galaxy shows a “red shift.” Which statement explains the red shift?

• The temperature of the galaxy is increasing.

• The temperature of the galaxy is decreasing.

• The galaxy is moving away from Earth.

• The galaxy is moving toward Earth.

Answer explanation

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https://ck12.co/YRkxR

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NGSS.HS-ESS1-2

Light from a star that is moving away from the Earth has a:

• longer wavelength and lower frequency than normal.

• shorter wavelength and lower frequency than normal.

• longer wavelength and higher frequency than normal.

• shorter wavelength and higher frequency than normal.

Answer explanation

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NGSS.HS-PS4-1

If a wave is blue-shifted the wavelengths are ______ than normal.

• shorter

• longer

• straighter

• taller

Answer explanation

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NGSS.HS-PS4-1

The apparent change in light frequency of a galaxy that is moving away from us is called:

• spectral diffraction.

• parallax.

• a red shift.

• a blue shift.

Answer explanation

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https://ck12.co/o7vSzg

 

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NGSS.HS-ESS1-2

How is the Doppler Effect important in astronomy?

• If can tell us if celestial objects are moving toward or away from us.

• It can help us identify different sounds made by objects.

• It can measure the speed of light.

• It can predict eclipses.

Answer explanation

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https://ck12.co/0GYGp

The diagram shows a standard spectrum compared to a spectrum produced from a distant star. Which conclusion can be made by comparing the two spectra?

• The distant star’s lines have shifted toward the red end of the spectrum and the star is moving toward the earth.

• The distant star’s lines have shifted toward the violet end of the spectrum and the star is moving away from earth.

• The distant star’s lines have shifted toward the red end of the spectrum and the star is moving away from earth.

• The distant star’s lines have shifted toward the violet end of the spectrum and the star is moving toward earth.

Answer explanation

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https://ck12.co/Kgh5ku

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NGSS.HS-PS4-3

Why can't scientists use parallax to find long distances?

• Because they can't see light from very distant stars.

• Because parallax increases at large distances.

• Because parallax decreases at large distances.

• Actually, they can - it's a great tool for finding relative distances anywhere.

Answer explanation

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In the diagram, which star is farthest away from Earth?

• Star A

• Star B

• Star C

• Star D

Answer explanation

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https://ck12.co/1cx0