Graded Assignment - Type-In
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Physical Science | Graded Assignment | HR Diagrams
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Graded Assignment
HR Diagrams Questions
Answer the following questions after you have completed the HR Plot. Use complete sentences and submit this file for grading.
How does our sun compare to other stars in terms of
ightness and temperature?
Answer:
Type your answer here.
Explain any patterns or trends displayed by the Group 1 stars.
Answer:
Type your answer here.
Which group of stars represents the Main Sequence? How do you know this?
Answer:
Type your answer here.
Group 2 and Group 3 stars represent which stages of development? Describe these groups in terms of their relative age, size,
ightness, and temperature.
Answer:
Type your answer here.
What determines if a star will end its life as a neutron star, a white dwarf, or a black hole?
Answer:
Type your answer here.
Graded Assignment - Type-In
Name:
Date:
Physical Science | Graded Assignment | Project: HR Diagrams
© 2015 K12 Inc. All rights reserved. Page 3 of 3
Copying or distributing without K12’s written consent is prohibited.
Graded Assignment
Project: HR Diagrams
Directions: Three data tables follow. Each table gives some information on groups of stars. Following these data data tables is a blank HR plot. Use the data from the data tables to create the HR plot.
Print this document. You should have three data tables and one blank HR plot.
Enter the Group 1 stars on the HR plot. Remember that HR diagrams plot temperature on the X axis and luminosity on the Y axis. You will plot only these values from the data tables. Draw a dot on the plot for each star in Group 1. Draw a circle around all the dots you drew for Group 1 and label it Group 1.
Enter the Group 2 stars on the same HR plot. Draw a square around all the dots you drew for Group 2 and label it Group 2.
Enter the Group 3 stars on the same HR plot. Draw a circle around all the dots you drew for Group 3 and label it Group 3.
Star Numbe
Group 1
Visual Magnitude (Apparent)
Distance (Light Years)
Temperature (Kelvin)
Luminosity (Sun = 1) (Absolute)
*1
Sun
-26.7
0.00002
5,800
1.00
*2
Alpha Centauri A
-0.01
4.3
5,800
1.5
*3
Alpha Centauri B
+1.4
4.3
4,200
0.33
*4
Alpha Centauri C
+11.0
4.3
2,800
0.0001
*5
Wolf 359
+13.66
7.7
2,700
0.00003
*6
Lalande 21185
+7.47
8.1
3,200
0.0055
*7
Sirius A
-1.43
8.7
10,400
23.0
*8
Luyten 726-8 A
+12.5
8.7
2,700
0.00006
*9
Luyten 726-8 B
+12.9
8.7
2,700
0.00002
*10
Ross 154
+10.6
9.6
2,800
0.00041
*11
Ross 248
+12.24
10.3
2,700
0.00011
*12
Epsilon Eridani
+3.73
10.8
4,500
0.30
*13
Ross 128
+11.13
11.0
2,800
0.00054
*14
61 Cygni A
+5.19
11.1
4,200
0.084
Star Numbe
Group 2
Visual Magnitude (Apparent)
Distance (Light Years)
Temperature (Kelvin)
Luminosity (Sun = 1) (Absolute)
*28
Arcturus
-0.06
36.0
4,500
110.0
*29
Betelgeuse
+0.41
500.0
3,200
17,000.0
*30
Aldebaran
+0.86
53.0
4,200
100.0
*31
Antares
+0.92
400.0
3,400
5,000.0
*32
Delta Aquarii B
+2.86
1,030.0
6,000
4,300.0
Star Numbe
Group 3
Visual Magnitude (Apparent)
Distance (Light Years)
Temperature (Kelvin)
Luminosity (Sun = 1) (Absolute)
*33
Sirius B
+8.5
8.7
10,700
0.0024
*34
Procyon B
+10.7
11.3
7,400
0.00055
*35
Grw XXXXXXXXXX
+13.19
49
9,800
0.0013
*36
L 879-14
+14.10
63?
6,300
0.00068
*37
Van Maanen’s Sta
+12.36
14
7,500
0.00016
*38
W 219
+15.20
46
7,400
0.00021
*39
Barnard’s Sta
+9.54
6.0
2,800
0.00045
*40
Luyten 789-6
+12.58
11.0
2,700
0.00009
*41
Canopus
-0.72
100.0
7,400
1,500.0
*42
Capella
+0.05
47.0
5,900
170.0
*43
Rigel
+0.14
800.0
11,800
40,000.0
*44
Alpha Crucis
+1.39
400.0
21,000
4,000.0
*45
Fomalhaut
+1.19
23.0
9,500
14.0
*46
Dene
+1.26
1,400.0
9,900
60,000.0
*47
Beta Crucis
+1.28
500.0
22,000
6,000.0