Galaxies that are redshifted are:

• actually blue.
• really far away.
• invisible.
• moving away from us.

Tags

NGSS.HS-ESS1-2

Base your answer to the following question on the diagram below representing the bright-line spectrum (fingerprint) for an element.

The spectrum of the same element observed in the light from a distant star is shown below.

The shift in the spectral lines (fingerprint) indicates that the star is moving

• toward Earth

• away from Earth

The diagram below shows the spectral lines for an element.

Which diagram best represents the spectral lines of this element when its light is observed coming from a star that is moving away from Earth?

• 
• 
• 
• 

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Compared to light from a stationary source at the same point, light from an object moving toward you is closer to which side of the spectrum?

• blue

• red

Tags

NGSS.HS-PS4-3

Light waves that are stretched out by objects moving apart:

• have a shorter wavelength.
• travel faster than the speed of light.
• are invisible.
• appear more red.

Tags

NGSS.HS-PS4-1

The Doppler effect predicts that light from a source moving away from Earth will have

• shorter wavelengths.

• longer wavelengths.

Tags

NGSS.HS-PS4-1

According to Hubble's law faster moving galaxies are now

• further away from us

• closer to us

Tags

NGSS.HS-ESS1-2

What kind of galaxy is this?

• Ring
• Irregular
• Spiral
• Elliptical 

What type of galaxy is this?

• Spiral
• Elliptical
• Irregular
• Irrational

What type of galaxy is this?

• Spiral
• Elliptical
• Irregular
• Irrational