Question

Star Types Quick Check
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Question
Use the diagram to answer the question.

The Hertzsprung-Russell Diagram shows the spectral class of stars across the top, the temperature in Kellvin of stars across the bottom. The luminosity of stars, with the luminosity of the Sun equal to one, on the right, and the absolute magnitude of stars on the right. Blue giants, red supergiants, red giants, main sequence stars, the Sun, and white dwarfs are shown on the diagram.

Which piece of spectral data is necessary to determine the spectral class of a star?

(1 point)
Responses

temperature
temperature

absolute magnitude
absolute magnitude

apparent magnitude
apparent magnitude

luminosity
luminosity
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Answer 1

To determine the spectral class of a star, the necessary piece of spectral data is **temperature**. The spectral class is primarily categorized based on the temperature of the star, which affects its color and the type of spectra it produces. Therefore, the correct option is:

**temperature**