Hubble's Law

What led to the discovery that the galaxies are receding away from each other?

• Hubble compared the distances to galaxies to their and their relationships.

• The Doppler effect was used to measure the redshift of galaxies.

• The cosmic microwave background radiation was used to measure the expansion of the universe.

• Hubble used the Big Bang Theory to explain the origin of the universe.

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

Tags

NGSS.HS-PS4-1

In the diagram, the spectral lines (fingerprint) of hydrogen gas from three galaxies, A, B, and C, are compared to the spectral lines of hydrogen gas observed in a laboratory. What is the best conclusion that can be made about the movement of galaxies A, B, and C?

• Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth.

• Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth.

• Galaxies A, B, and C are all moving toward Earth.

• Galaxies A, B, and C are all moving away from Earth.

Tags

NGSS.HS-ESS1-2

According to Hubble's law faster moving galaxies are now

• further away from us

• closer to us

Tags

NGSS.HS-ESS1-2

The theory that the universe is expanding is supported by the

• blue shift of light from distant galaxies

• red shift of light from distant galaxies

Tags

NGSS.HS-ESS1-2

When viewed from Earth, the light from very distant galaxies shows a red shift. This is evidence that these distant galaxies are

• moving away from Earth

• moving toward Earth

Tags

NGSS.HS-ESS1-2

In a Doppler red shift, the observed wavelengths of light from distant space objects appear closer to the red end of the spectrum than light from similar nearby space objects. The explanation for the red shift is that the universe is presently

• Getting smaller

• Expanding

• Not changing in size

Tags

NGSS.HS-ESS1-2

The more that the spectral lines of a star are shifted to the red end of the spectrum

• the larger it is.

• the hotter it is

• the faster it is moving away from us

Tags

NGSS.HS-ESS1-2

A star moving away from the Earth will have a spectrum containing

• red shifted lines

• blue shifted lines

Tags

NGSS.HS-PS4-3

What does Hubble's Law state about the relationship between the velocity of a galaxy and its distance from Earth?

• The velocity is directly proportional to the distance.

• The velocity is inversely proportional to the distance.

• The velocity is constant regardless of the distance.

• The velocity is unrelated to the distance.