1. Which of the following layer of the Sun has convection?
   (A) radiative envelope
   (B) photosphere
   (C) chromosphere
   (D) corona
   (E) all of the above

2. The granules of the Sun occur in the
   (A) radiative envelope
   (B) photosphere
   (C) chromosphere
   (D) corona
   (E) all of the above

3. Sunspots occur in the Sun's
   (A) radiative envelope
   (B) photosphere
   (C) chromosphere
   (D) corona
   (E) all of the above

4. Sunspots are dark because
   (A) they are made of opaque gases.
   (B) they don't emit any light at all.
   (C) they are cooler than their surroundings.
   (D) they absorb all of the light incident on them.
   (E) fusion doesn't take place there.

5. Sunspots occur in pairs because
   (A) magnetic field has two poles.
   (B) fusion reactions require at least two particles.
   (C) the sun consists of matter and anti-matter.
   (D) one is the mirror image of the other.
   (E) two heads are better than one.

6. The number of sunspots reached a maximum in the year 1990. When do we expect to see the number of sunspots peak again?
   (A) 1995
   (B) 1999
   (C) 2001
   (D) 2004
   (E) 2008

7. The corona of the Sun
   (A) is very hot.
   (B) is not very dense.
   (C) does not emit much visible light.
   (D) is bright in X-rays.
   (E) all of the above

8. The Sun produces energy by
   (A) gravitational contraction.
   (B) fusing hydrogen into helium.
   (C) smashing helium into hydrogen.
   (D) converting angular momentum into energy.
   (E) windmills blown by the solar wind.

9. What are needed in order to have thermonuclear reaction?
   (A) presence of positrons and electrons
   (B) presence of neutrinos and gamma rays
   (C) rotation and convection
   (D) high temperature and high density
   (E) hydrogen and helium

10. Which of the following plays the most important role in producing sunspots?
    (A) limb darkening
    (B) positron-electron annihilation
    (C) convection in the photosphere
    (D) thermonuclear burning
    (E) rotation

11. The gamma-ray photons we observe from the Sun are emitted in
    (A) the core
    (B) the photosphere
    (C) the chromosphere
    (D) solar flares
    (E) sunspots

12. Which of the following has the smallest mass?
    (A) 4 free protons
    (B) 4 free neutrons
    (C) 2 free protons and 2 free neutrons
    (D) a helium nucleus
    (E) they are all the same

13. A star's color is a measure of its
    (A) mass.
    (B) size.
    (C) luminosity.
    (D) temperature.
    (E) radial velocity.

14. OBAFGKM is
    (A) an acronym for an X-ray satellite.
    (B) a list of stellar types from coolest to hottest (left to right).
    (C) a list of spectral types from hottest to coolest (left to right).
    (D) a type of variable star.
    (E) a name of Campbell's new alphabet soup.

15. Star A's magnitude is 1. Star B's magnitude is 5. Which of the following statements is true?
    (A) Star A hotter than Star B.
    (B) Star A is brighter than Star B.
    (C) Star A is more massive than star B.
    (D) Star A has a stronger magnetic field than Star B.
    (E) All of the above.

16. Which of the following cannot be determined from naked-eye observations?
    (A) position of a star
    (B) color of a star
    (C) brightness of a star
    (D) magnetic field of a star
    (E) retrograde motion of a planet

17. Parallax can be used to measure a star's
    (A) mass.
    (B) brightness.
    (C) proper motion.
    (D) magnetic field.
    (E) distance.

18. The Big Dipper will appear differently in the sky in 10⁶ years from now because
    (A) one of the handle stars will explode soon.
    (B) some stars are pulsating like crazy.
    (C) these stars have different Doppler's shifts.
    (D) these stars have different proper motions.
    (E) these stars are evolving differently.

19. Star A and star B have the same intrinsic brightness, but star A is 10 times farther away than star B.
    (A) Star A will appear 10 times brighter than star B.
    (B) Star A will appear 100 times brighter than star B.
    (C) Star A will appear 10 times fainter than star B.
    (D) Star A will appear 100 times fainter than star B.
    (E) Star A and star B will appear similarly bright.

20. The star Pollux is at a distance of 10 pc from us. Its apparent magnitude is 1. Its absolute magnitude is
    (A)  -2
    (B)  -1
    (C)  0
    (D)  1
    (E)  2

21. The spectral type of the Sun is
    (A)  O2
    (B)  B2
    (C)  A2
    (D)  F2
    (E)  G2

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