Hertzsprung-Russell Diagrams
Grade 7•45 minutes
Learning Objective
I can use an H-R diagram to classify stars and infer their properties, such as age and evolutionary stage.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain the Harvard classification system for stars (OBAFGKM). What property of stars does this classification primarily describe?
2. Describe the axes of a Hertzsprung-Russell (H-R) diagram. What do the horizontal and vertical axes represent?
3. Where are most stars located on the H-R diagram? What is this region called, and what does it tell us about these stars?
...and 4 more questions
Educational Video
Classification of Stars: Spectral Analysis and the H-R Diagram
Professor Dave Explains