ISAT Science Grade 11 Practice Questions - Idaho Standards Achievement Test (ISAT) Science - Grade 11 Exam

Which observation is strong evidence that the universe is expanding?

Galaxies show spectral lines shifted toward longer wavelengths (redshift) All stars appear blue regardless of distance Planets orbit the Sun in elliptical paths Meteorites contain iron and nickel alloys

Correct Answer:

Galaxies show spectral lines shifted toward longer wavelengths (redshift)

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