Help ASAP 100 points Question 3 (1 point)
How do scientists use the Doppler effect to understand the universe?

Question 3 options:

to determine motion of objects

to determine light brightness

to determine planet compositition

to determine the ages of planets

Question 4 (1 point)
The Doppler effect indicates that the universe is expanding because.

Which phrase best completes the sentence.

Question 4 options:

light from other galaxies is the same color

light from other galaxies is the different color

light from other galaxies is blue shifted

light from other galaxies is red shifted

Question 5 (1 point)
What does a blue shift in light from stars indicate?

Question 5 options:

The stars are moving randomly.

The stars are moving closer.

The stars are moving farther away.

The stars are stationary.