AnswersPhysics in the UniverseStars and the Origin of the Universe

Practice Test Answers

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1
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Given the inverse relationship between parallax and a star's distance, order the stars from closest to farthest.

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2
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Which object is farthest from Earth?

A
A galaxy whose distance was determined by Cepheid variable stars.
B
A galaxy whose distance was determined by type Ia supernovae.
C
A planet within our solar system, measured by radar ranging.
D
A star that was measured using geometric parallax.
9

What is the relationship between a galaxy's distance from Earth and its velocity?

A
The closer a galaxy is, the faster it moves away.
B
The farther a galaxy is, the slower it moves away.
C
The farther a galaxy is, the faster it moves away.
D
There is no clear relationship between distance and velocity.
10

Which best describes Clara’s error?

A
During redshift, the light source and observer move closer together, not farther apart.
B
The temperature of the CMB is cooler, not hotter, than at the time of the big bang.
C
The CMB is blue-shifted, not red-shifted, to the microwave region.
D
The redshift indicates approaching, not receding, galaxies.
11

Arrange the stars from closest to farthest. Place the closest star at the top of the list.

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