Question 1

________ is the shift of absorption bands towards the red end of the visible light spectrum. (The "Doppler Effect" of light)

Accepted Answer

red shift

Answer

spectrum shift

Answer

Red Effect

Answer

Doppler effect

Question 2

Hubble's law states that:

Accepted Answer

The farther away a galaxy is, the fast it is moving away from us.

Answer

The farther away a galaxy is, the slower it is moving away from us.

Answer

The closer a galaxy is, the faster it is moving away from us.

Answer

The distance of a galaxy from Earth has no effect on its speed of movement.

Question 3

The universe is expanding

Accepted Answer

true

Answer

false

Question 4

What is true about the universe?

Accepted Answer

d. A and B are true

Answer

c. The universe is shrinking

Answer

b. the space between galaxies is increasing

Answer

a. Galaxies stay the same size

Question 5

This element was first discovered by studying absorption lines from our Sun.

Accepted Answer

Helium

Answer

Carbon

Answer

Oxygen

Answer

Hydrogen

Question 6

(5 pts) How do astronomers know when a galaxy is moving away from Earth?

Accepted Answer

A redshift in the light from that galaxy is observed from Earth's surface.

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