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Please DO NOT Write on this Test
Test: The Sun and Other Stars
Write (A) for True or (B) for False
1.
Atoms of elements such as helium and carbon were formed in the interior of stars.
2.
Solar flares have twisted and looped shapes because of the solar magnetic field.
3.
Most of the visible light from the sun originates in the chromosphere.
4.
The location of a star in the HR diagram indicates its temperature and luminosity (brightness).
5.
Only stars with very small masses will produce supernovae.
6.
The sun is mostly oxygen and carbon.
7.
Our sun is a class G star.
8.
The mass of a star determines how quickly fusion will occur and therefore how long the
star will “live”.
9.
Yellow stars are hotter than blue stars.
10.
The Doppler effect indicates if an object is moving toward or away from an observer.
11.
The atomic number of an atom is the number of protons in an atom’s nucleus.
12.
The temperature & life expectancy of a star can be determined from its distance.
13.
The nucleus of the hydrogen atom consists of a single proton.
Multiple Choice:
14. Stars on the main sequence with the greatest mass are
a. spectral type M stars.
b. spectral type O stars.
c. very similar to our sun
d. both b and c
15. In the HR diagram, stable stars with the smallest mass and lowest temperature are found in the
______ of the diagram.
a. center (main sequence)
b. upper left corner
c. upper right corner
d. lower right corner
16. The ________ of a star is a measure of the total energy radiated by the star.
a. apparent visual magnitude
b. spectral type
c. luminosity
d. H-R diagram
17. The corona of the sun can be observed
a. during a lunar eclipse.
b. at any time
c. during a solar eclipse.
d. never from Earth
18. Sunspots are dark because
a. regions of the photosphere are obscured by material in the chromosphere.
b. fusion is occurring in the photosphere.
c. they are holes in the sun’s surface
d. the strong magnetic field inhibits convection of hot gas, making those spots cooler
19. A ________ is believed to occur when energy, stored in a twist in the solar magnetic field above a
sunspot, is suddenly released into space.
a. sun spot
b. fision reaction
c. solar flare
d. eclipse
20. The two most abundant elements in the sun are
a. nitrogen and oxygen.
c. carbon and hydrogen.
b. carbon and nitrogen.
d. hydrogen and helium.
21. This spectral class of stars have the lowest temperature.
a. O
b. A
c. M
d. G
e. F
22. Stars that are moving away from earth will exhibit a ____ shift of their wavelengths.
a. orange
b. red
c. yellow
d. blue
e. green
Completion: Fill in the blanks with the appropriate vocabulary term from the list below.
HR Diagram
Nuclear Fusion
Red Giant
Red Shift
Sunspots
Main Sequence
Protons
Blue Shift
Solar Prominences
White Dwarf
Electrons
Supernova
23. Stars spend most of their lives in this stage
24. Powerful explosions that blast away the outer layers of massive stars near the end of their
“lives”.
25. Reactions that join the nuclei of atoms to form more massive nuclei.
26. Eruptions on the solar surface that return back to the sun’s surface.
27. The final stage for stars less than 8 x solar mass, once fusion has stopped. Our sun’s final stage.
28. The positively charged particle of an atom, found in its nucleus.
29. The shift toward the shorter wavelengths of light caused by an object moving toward the Earth.
Use the Hertzprung-Russell diagram above to answer questions 30-34
30. According to the diagram, what stage is Vega currently in?
a. White Dwarf
b. Main Sequence
c. Red Giant
d. Red Dwarf
31. A star with a temperature of 15,000 K and a luminosity approximately 1/100 of the sun is a:
a. White Dwarf
b. Main Sequence
c. Red Giant
d. Red Dwarf
32. Aldebaran is a red giant star found in the constellation Taurus. What spectral class is it?
a. O
b. A
c. F
d. K
33. Cool stars with low luminosity are categorized as:
a. White Dwarf
b. Main Sequence
c. Red Giant
34. Which star is producing the most energy in its core?
a. Spica
b. Rigel
c. Capella
d. The Sun
d. Red Dwarf
Name____________________________________
Period_______
Test: The Sun and Other Stars
40
Write (A) for True and (B) for False:
1. _______
2. _______
Completion:
3. _______
23. __________________________
4. _______
24. __________________________
5. _______
25. __________________________
6. _______
26. __________________________
7. _______
27. __________________________
8. _______
28. __________________________
9. _______
29. __________________________
10_______
11._______
12._______
H-R Diagram:
13._______
30. _________
31. _________
32. _________
Multiple Choice:
33. _________
14._________
34. _________
15._________
16._________
17._________
18._________
19._________
20._________
21._________
22._________
(Don’t forget #35-40 on the back of this page)
Label the layers of the Sun’s interior:
35
36
37
Label the layers of the Sun’s atmosphere:
38
39
40