Doppler Effect, Redshift/Blueshift

What best describes the doppler effect?

If a star is being observed from Earth and its light has shifted towards the blue side of the electromagnetic spectrum it would be...

If a star is being observed from Earth and its light has shifted towards the red side of the electromagnetic spectrum it would be...

The vast majority of galaxies in our universe are moving away from us.  We know this because we observe __________ in the galaxies absorption spectra.

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

An object that is moving VERY fast away from Earth would have ________ than an object that is moving very slow away from Earth.

An object that is moving VERY fast towards the Earth would have ________ than an object that is moving very slow towards the Earth.

Which discovery(ies) came from our understanding redshift/ blueshift? Options: The universe is expanding, Most galaxies are moving away from us, Andromeda galaxy will collide with the Milky way in 3.75 billion years, All of the above (and many more)