Download the lab handout here

Name ________________________________
Date ________________
Period _______
LAB ACTIVITY
The Hertzsprung-Russell Diagram
Small
Stars
Massive
Stars
!
6,000
8,000
30,000
0.0001
0.0005
0.001
0.005
0.01
0.05
0.1
0.5
1
10
5
50
100
500
5,000
10,000
50,000
100,000
20,000
DWARFS
10,000
MA
Luminosity
500,000
1000
(Number of times brighter than the sun)
1,000,000
Surface Temperature (K)
4,000
E
NC
QU
E
SE
IN
Characteristics of Stars
SUPERGIANTS
GIANTS
3,000
Color
2,000
Please visit www.HMXEarthScience.com/hr_diagram_lab.html and follow the instructions to
complete the activities below.
Conclusion Questions
1.
Which four properties does the HR diagram use to classify stars?
1.
________________________________________________
2.
________________________________________________
3.
________________________________________________
4.
________________________________________________
2.
How many types of stars are shown on the HR Diagram? ___________________________
3.
Which of the stars you plotted was the brightest? ____________ hottest? ____________
4.
As a star changes color from red to blue, describe what happens to its surface
temperature?___________________________________________________________________
5.
A Main Sequence star that is 10,000 times more luminous than the sun, most likely has a
temperature of _________________________________________________________________
6.
What color is a Main Sequence star that is 1000 times brighter than the sun?
_______________________________________
7.
According to the HR diagram, a massive star with a surface temperature of 20,000 K
that is nearly a million times brighter than the sun would mostly likely be classified as a
________________________________________
8.
Which type of star is dimmer than the Sun?
_________________________________________
9.
How does the temperature and luminosity of the Sun compare to that of the other stars
on the Main Sequence? ________________________________________________________
10. What is the relationship between luminosity and temperature for stars on the Main
Sequence? _____________________________________________________________________