H-R Diagram: Definition & Purpose


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question 1 of 3

To what spectral class does the sun belong?

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1. What is another term for luminosity?

2. What are the four main types of stars shown on the HR Diagram??

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About This Quiz & Worksheet

The H-R diagram is a key tool in astronomy, and this quiz/worksheet will help you assess your understanding of its use as well as related terms and principles.

Quiz & Worksheet Goals

In these assessments, you'll be tested on the principles and components of:

  • Spectral class
  • The H-R diagram and what it shows
  • Luminosity
  • The sun's class

Skills Practiced

This quiz and worksheet allow students to test the following skills:

  • Defining key concepts - ensure you can accurately identify another term for luminosity
  • Reading comprehension - ensure that you draw the most important information from the lesson on the traits of the H-R diagram
  • Information recall - access the knowledge you've gained regarding types of stars and spectral class
  • Distinguishing differences - compare and contrast the temperature scale on the H-R diagram and the temperature scale on other graphs

Additional Learning

To learn more about astronomy and the H-R diagram, review the accompanying lesson called H-R Diagram: Definition & Lesson. This lesson covers the following objectives:

  • Define luminosity
  • Familiarize yourself with the characteristics and application of the H-R diagram
  • Know the factors that determine spectral class
  • Learn the four main types of stars