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Part 1 of 1 -14.0 PointsQuestion 1 of 121.0 Pointsshowing page 1-5 out of 5

Part 1 of 1 -
14.0 Points
Question 1 of 12
1.0 Points
Why do sunspots look dark?
 
A. They are spots on the Sun that are less reflective.
 
B. They are the shadows of magnetic field loops and prominences.
 
C. They are areas with a higher amount of hydrogen and calcium.
 
D. They are regions with lower temperature.
Answer Key:D
Question 2 of 12
1.0 Points
The Zeeman effect refers to which of the following:
 
A. Differential rotation rates at the pole vs. the equator of the Sun.
 
B. The 11 year cycle of sunspot maxima and minima.
 
C. The splitting of spectral lines in the presence of a magnetic field.
 
D. The sudden release of energy in a solar flare.
Answer Key:C
Question 3 of 12
1.0 Points
All of the following are magnetic phenomena that occur on the Sun except:
 
A. flares
 
B. prominences
 
C. spirals
 
D. CMEs
Answer Key:C
Question 4 of 12
1.0 Points
The Solar Wind originates mainly from:
 
A. coronal holes
 
B. sunspots
 
C. prominences
 
D. plages
Answer Key:A
Question 5 of 12
1.0 Points
On average, sunspots counts rise and fall on an 11
 year cycle. (Enter a number only.) 
Answer Key:11
Question 6 of 12
1.0 Points
Magnetic fields on the Sun reverse polarity from North to South to North on a 22
 year cycle. 
Answer Key:22
Question 7 of 12
1.0 Points
Sunspots generally form in pairs.
True
False
Answer Key:True
Question 8 of 12
1.0 Points
Leading sunspots always have "north" polarity.
True
False
Answer Key:False
Question 9 of 12
3.0 Points
Which of the following are are sources of particles that contribute significantly to solar weather?
A. solar flares
B. sunspots
C. prominences
D. CMEs
E. coronal holes
F. plages
Answer Key:A, D, E
Question 10 of 12
1.0 Points
Where on Earth would be the best place to live to avoid space weather?
 
A. Alaska
 
B. Ecuador
 
C. Norway
 
D. Australia
Answer Key:B
Question 11 of 12
1.0 Points
Suppose future astrononauts are living on a Martian base when a major solar flare occurs. How
long will it be before the charged particles ejected from the Sun during the flare reach them?
(Hint: use the data in the text to calculate this.)
 
A. 569,000 days
 
B. 4.31 days
 
C. 0.57 days
 
D. 6.59 days
Answer Key:D
Question 12 of 12
1.0 Points
Which of the following lists the layers of the Sun's atmosphere in order of increasing radius?
 
A. transition region, photosphere, corona, chromosphere
 
B. chromosphere, photosphere, transition region, corona
 
C. corona, chromosphere, transition region, photosphere
 
D. photosphere, chromosphere, transition region, corona
Answer Key:D