1. The energy source of stars is primarily associated with
a. the reactions of atoms in the star corona.
b. the reactions of nuclei in the star core.
c. the reactions of atoms in the outer regions of the star.
d. burning of elements until they become radioactive.
e. burning of elements heavier than lead.
2. If scientists located a Dyson Sphere, they would find
a. something made from a dismantled planet.
b. a planet in orbit around our closest star.
c. an energy source built to surround a planet.
d. an object at the core of the Sun.
e. the corona during a total eclipse.

3. The solar wind
a. extends into space as far as Mercury.
b. consists of hydrogen and carbon particles.
c. is a part of the Sun's atmospheric circulation.
d. affects the magnetic fields of planets.
e. is another term for the Sun's chromosphere.
4. Which of the following can be said about large stars?
a. Large stars have a longer lifetime than smaller stars.
b. Large stars have a shorter lifetime than smaller stars.
c. Large star lifetime is about the same as that of smaller stars.
d. The helium in the large star's core burns to produce hydrogen.
e. Large stars are the source of oxygen in photosynthesis.
5. At this moment, the Sun is producing energy by burning
a. plutonium.
b. anthracite.
c. hydrogen.
d. helium.
6. The end products of fusion in the Sun's core are
a. helium isotopes, protons, and gamma rays.
b. hydrogen isotopes, photons, and infrared rays.
c. helium ions, photons, and hydrogen isotopes.
d. hydrogen ions, protons, and gamma rays.
e. deuterium, photons, and gamma rays.
7. Approximately how long does it take the energy of the Sun to be transferred from the stellar core to the photosphere?
a. one light-year
b. many thousands of years
c. 24 hours
d. one month
e. eight minutes
8. Which of the following affect the life of a star?
a. gravitational force
b. mass
c. temperature
d. fusion processes
e. all of the above
9. From what part of the electromagnetic spectrum is most of the Sun's energy emitted?
a. radio waves
b .infrared waves
c. visible light waves
d. gamma rays
e. microwaves
10. Which of the following satellite observatories could not detect the presence of a black hole?
a. Compton Gamma Ray Observatory (GRO)
b. Chandra X-ray Observatory
c. Hubble Space Telescope (HST)
d. Space Infrared Telescope Facility (SIRTF)
e. only a and b
11. Differences in how a star appears in the sky are a function of
a. the size of the star.
b. how far away the star is from Earth.
c. the total energy emitted by the star.
d. the star's apparent brightness.
e. all of the above
12. The Hertzsprung-Russell diagram is a graphical technique used in astronomy to compare
a. the surface temperature versus the energy output of a star.
b. the star's luminosity versus its distance from Earth.
c. the absolute magnitude of the star versus the star's relative temperature.
d. the distance the Sun is from the nearest red giant.
e. the location of possible solar systems in the Milky Way.
13. Where in the Milky Way galaxy would astronomers expect to find planetary systems other than our own?
a. Dyson Sphere
b. nebulae
c. supernovas
d. black hole
e. Cepheid stars
14. Which of the following is not an endpoint of stellar evolution?
a. white dwarf
b. main sequence star
c. pulsar
d. black hole
e. neutron star
15. Where were the heaviest chemical elements on Earth created?
a. neutron stars
b. black holes
c. the Sun
d. supernovae
e. the asteroid belt
16. If you were to observe a pulsar, what would you see?
a. a blinking red glow
b. intermittent radio waves
c. a steady glow that oscillates among the stars
d. the sudden brightening of a star
e. the total eclipse of the Sun
17. What is Supernova 1987A likely to become?
a. black hole
b. pulsars
c. main sequence star
d. Cepheid variable
e. solar wind
18. If the Hubble telescope detects an intensely bright region in the sky that lasts only a few days, it has probably found evidence of a
a. white dwarf.
b. supernova.
c. main sequence star.
d. new galaxy.
e. black hole.
19. Which of the following star variables would not be in an astronomer's data?
a. wave length
b. intensity
c. sound
d. position
e. brightness
20. Which of the following telescopes would have a collecting mirror?
a. Chandra X-ray orbiting observatory telescope
b. Hubble telescope
c. Very Large Array telescope in New Mexico
d. Hertzsprung-Russell telescope at Harvard
e. all of the above
21. Which of the following is among the things scientists predict for Sun's demise?
a. The burning of helium will produce a carbon ash core.
b. The Sun will expand until it extends past the present orbit of Venus.
c. The sun will emit more energy but appear to be cool.
d. At different points in its final years, the Sun will become a red giant and a white dwarf.
e. All of the above are true.
22. Red giants can be described as
a. huge planets that are surrounded by gases.
b. large stars that emit a lot of energy but have cool surfaces.
c. large stars that emit a lot of energy but have glowing, hot surfaces.
d. stars that are in the hydrogen-burning stage of their lives.
e. large planets with glowing iron oxide surfaces.
38. The iron in your blood was made during
a. a chemical process that occurred during Earth's formation.
b. the final moments in the life of a small star.
c. fusion during our Sun's creation.
d. fission reactions during the Big Bang.
e. the nuclear burning of a very large star.
39. If you were describing the structure of the Sun correctly, you would say that
a. ten percent of the total volume of the Sun is the core.
b. the Sun's outer region is a convection zone.
c. the photosphere thins away from the Sun's surface.
d. a gaseous chromosphere and corona are visible only during a solar eclipse.
e. All of the above are true.
40. Why do astronomers prefer orbiting telescopes over Earth-based telescopes?
a. lower user costs and more research time options
b. exciting space travel possible for observations
c. wider range of electromagnetic wavelengths detected
d. greater international cooperation
e. more aesthetically pleasing