Classifying Stars
2 marks · Easy| Star class | Surface temperature (K) | Colour |
|---|---|---|
| B | 20,000 | blue-white |
| G | 5,800 | yellow |
| K | 4,600 | orange |
| M | 3,200 | red |
Which star class in the table has a surface temperature closest to the Sun? State the colour of this class.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
G class; colour is yellow
Also accept: G, yellow
Common mistakes: Choosing K or B; Saying the Sun is white or blue
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Correctly identifies G class as closest to the Sun’s surface temperature.
B2 · 1 mark · States that G class stars are yellow.
Worked solution
The Sun has a surface temperature close to 5800 K, which matches a G class star. According to the table, G stars are yellow.