H-R Diagram Gizmo | ExploreLearning

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Michal Kreiselman

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H-R Diagram

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A collection of stars visible from Earth can be arranged and classified based on their color, temperature, luminosity, radius, and mass. This can be done using one or two-dimensional plots, including a Hertzsprung-Russell diagram of luminosity vs. temperature.

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Assessment Questions (5):

Order the following stars from coolest to hottest.
- A. star A, star B, star C
- B. star B, star C, star A
- C. star B, star A, star C
- D. star C, star B, star A
For most stars, what does a higher temperature tend to go with?
- A. A lower luminosity
- B. A higher luminosity
- C. A red color
- D. None of the above
For a standard H-R diagram, what are the stars in the lower left region of the diagram?
- A. Main sequence stars
- B. Supergiants
- C. Giants
- D. White dwarfs
Stars on the upper left end of the main sequence differ from those on the lower right end in what way?
- A. Stars on the upper left end are less massive.
- B. Stars on the upper left end are more massive.
- C. Stars on the upper left end tend to be red in color.
- D. Stars on the upper left end are near the end of their life cycle.
How do white dwarfs compare with supergiants, in terms of temperature and luminosity?
- A. White dwarfs are cooler and have higher luminosity than supergiants.
- B. White dwarfs are cooler and have lower luminosity than supergiants.
- C. White dwarfs are warmer and have higher luminosity than supergiants.
- D. White dwarfs are warmer and have lower luminosity than supergiants.

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