H-R diagram worksheet
Part 1: Shading Areas on the H-R diagram
From left to right between the dotted lines, shade the following colors lightly on the diagram with
colored pencils: Blue, light blue, white, yellow, orange, red
Part 1I: Areas on the H-R diagram
For #’s 1-5, circle the name of the area on the H-R diagram where you would find each type of star.
If more than one word describes the area, for example “top right” circle both words.
hot bright stars:
cool dim stars:
main sequence stars:
Part III: Plotting Stars
Mark each of the following on the H-R diagram and label it as indicated. You may use page 15 of
your ESRT to help you.
6. Draw and label a long diagonal line showing the approximate location of the main sequence.
7. A large circle indicating the area where you find the biggest diameter stars, labeled supergiants
8. A large circle indicating where you would find white dwarfs, labeled white dwarfs
9. A blue main sequence star labeled B
10. A red dwarf main sequence star labeled D
11. A sun-like star labeled S
12. A red giant the same color as D and the same brightness as B labeled G
13. A white dwarf the same color as B and the same brightness as D labeled wd
Part 3: Getting Information from the H-R Diagram
13. Stars B and G have the same brightness. Does this mean they are the same temperature?
Why or why not?
14. Stars D and G have the same color. Does this mean they are the same temperature? Why or
15. What is different about star G that allows it to be the same color as D but as bright as B?
16. How can a white dwarf be so hot in temperature but still not as bright as or Sun?
Part 4: Using the Chart in your ESRT
Use your Earth Science Reference Tables (p. 15) and the following symbols: “ >” “<” or “=”
to compare the following pairs of stars. The first one has been done for you.
40 Eridani B
40 Eridani B