H-R diagram worksheet

Name: __________________________
Date: ____________
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.
1.
2.
3.
4.
5.
bright stars:
hot stars:
hot bright stars:
cool dim stars:
main sequence stars:
top
top
top
top
top
bottom
bottom
bottom
bottom
bottom
left
left
left
left
left
right
right
right
right
right
center
center
center
center
center
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
why not?
15. What is different about star G that allows it to be the same color as D but as bright as B?
Explain.
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.
>
1. LUMINOSITY:
Rigel
Procyon B
2. LUMINOSITY:
Sirius
Deneb
3. LUMINOSITY:
Betelgeuse
Barnard’s Star
4. LUMINOSITY:
Sun
40 Eridani B
5. TEMPERATURE:
40 Eridani B
Proxima Centauri
6. TEMPERATURE:
Polaris
Spica
7. TEMPERATURE:
Aldebaran
Pollux
8. TEMPERATURE:
Sun
Alpha Centauri
9. TEMPERATURE:
Betelgeuse
Barnard’s Star