RISE Science - Earth Science Practice Questions - RISE Science - High School Earth Science Exam

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Astronomers observing light from distant galaxies notice that atomic absorption spectral lines are systematically shifted toward longer wavelengths (redshift). According to Hubble's Law, what does a greater redshift indicate about a galaxy?

It is moving toward Earth at a high velocity. It contains higher concentrations of heavy metallic elements. It is farther from Earth and receding at a faster velocity due to expanding space. It is approaching the end of its stellar lifecycle as a white dwarf.

Correct Answer:

It is farther from Earth and receding at a faster velocity due to expanding space.

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