ASTRONOMY HELP PLEASE!!!?

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3.
Displays of auroras are least frequent

Student Response
A. at sunspot minimum.
B. at sunspot maximum.
C. at random times unrelated to the sunspot cycle.
D. during occasional prolonged peaks of solar activity.





5.
Below are the characteristics of 4 stars - their current characteristics and their future characteristics (after they have evolved a little bit). Which star's radius will increase in size as it evolves (from Current to Future)?
STAR Current Absolute Magnitude
Current Color
Future Absolute Magnitude
Future Color

Brady
3
Red
3
Yellow


Partridge
5
Red
7
Red


Gilligan
0
Blue-White
0
Yellow

Cleaver
5
Orange
7
Yellow




Student Response
A. Brady
B. Partridge
C. Gilligan
D. Cleaver
E. It is not possible to answer this question with the information provided.



6.
If the radius of a star were to decrease by a factor of 3, the star's luminosity would

Student Response
A. increase by a factor of 3
B. decrease by a factor of 3
C. increase by a factor of 9
D. decrease by a factor of 9
E. not change.



7.
The most massive main-sequence stars are

Student Response
A. red.
B. blue.
C. orange.
D. yellow.



8.
If a star has a parallax of 0.02 seconds of arc, then its distance is

Student Response
A. 20 pc
B. 50 pc
C. 2 pc
D. 5 pc
E. 500 pc



9.
Which of the following is the correct order of the layers of the Sun's atmosphere going from the deepest to the top layer?

Student Response
A. Photosphere, Chromosphere, Corona
B. Photosphere, Corona, Chromosphere
C. Chromosphere, Photosphere, Corona
D. Chromosphere, Photosphere, Corona



10.
Wien's law can be used to directly determine

Student Response
A. the temperature of a star.
B. the radius of a star.
C. the luminosity of a star.
D. the mass of a star.
 
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