| Question | Answer | % Correct |
|---|---|---|
| What is the colour of stars in the O spectral class? | Blue | 100%
|
| What is the colour of stars in the B spectral class? | Blue | 76%
|
| What is the colour of stars in the F spectral class? | White | 52%
|
| What is the colour of stars in the K spectral class? | Orange | 48%
|
| What is the colour of stars in the M spectral class? | Red | 48%
|
| What is the maximum temperature of the O spectral class? | 50,000 | 43%
|
| What is the colour of stars in the A spectral class? | Blue-white | 43%
|
| What is the colour of stars in the G spectral class? | Yellow-white | 38%
|
| What is the minimum temperature of the O spectral class? | 25,000 | 33%
|
| What is the maximum temperature of the B spectral class? | 25,000 | 33%
|
| What is the minimum temperature of the K spectral class? | 3,500 | 29%
|
| What is the maximum temperature of the M spectral class? | 3,500 | 29%
|
| What is the minimum temperature of the G spectral class? | 5,000 | 29%
|
| What is the maximum temperature of the K spectral class? | 5,000 | 29%
|
| What is the minimum temperature of the M spectral class? | 0 | 24%
|
| What is the minimum temperature of the F spectral class? | 6,000 | 24%
|
| What is the maximum temperature of the G spectral class? | 6,000 | 24%
|
| What is the minimum temperature of the A spectral class? | 7,500 | 24%
|
| What is the maximum temperature of the F spectral class? | 7,500 | 24%
|
| What are the strongest spectral lines in the B class? | Helium and hydrogen | 24%
|
| What are the strongest spectral lines in the O class? | Helium+ ion and helium | 24%
|
| What other lines are present in the O class? | Hydrogen | 24%
|
| What is the minimum temperature of the B spectral class? | 11,000 | 19%
|
| What is the maximum temperature of the A spectral class? | 11,000 | 19%
|
| What is the most prevalent absorption in the A class? | Hydrogen | 10%
|
| What are the most prevalent absorptions in the K class? | Metal atom | 5%
|
| What other lines are present in the A class? | Metal ion | 5%
|
| What are the strongest spectral lines in the F class? | Metal ion | 5%
|
| What spectral lines are present in the G class? | Metal ion/atom | 5%
|
| What spectral lines are present in the M class? | Atom and molecule | 0%
|