AY 101-002                                                       Spring 2008
                                   QUIZ #7

Answer each of the following on a computer-gradeable answer sheet. Be
sure to fill in your name and student number (and blacken their circles as 
well). Write your seat number on a corner of the answer sheet.

1. To measure a star's distance using parallax, we measure
   a) its luminosity.
   b) its apparent size.
   c) changes in its Doppler shift.
   D) ITS POSITION IN THE SKY AT DIFFERENT TIMES OF THE YEAR. 

2. The solar cycle is associated with periodic changes in the Sun's
   a) neutrino emission.                 c) diameter.
   B) MAGNETIC FIELD.                    d) fusion rate.

3. The net effect of processes in the sun's core is to
   A) START WITH HYDROGEN AND TRANSFORM IT INTO HELIUM.
   b) start with helium and transform it into hydrogen.
   c) start with hydrogen and transform it into iron.
   d) start with iron and transform it into hydrogen.

4. Long-term changes in the solar cycle have coincided with changes in
   a) meteor showers.                  C) THE EARTH'S CLIMATE.
   b) the Earth's orbit.               d) the Sun's rotation. 

5. Sunspots are a side effect of
   a) changes in the rate of energy production within the Sun.
   B) LOOPS IN THE SUN'S MAGNETIC FIELD.
   c) solar neutrinos.
   d) the planets' gravitational pull.

6. We might expect which of these to be least changed since the early 
   formation of the Solar System?
   A) COMETS IN THE OORT CLOUD.
   b) trans-Neptune objects in the Kuiper Belt.
   c) asteroids.
   d) planetary moons.

7. Confirmation of nuclear processes in the Sun comes from measuring
   a) gamma rays.                      c) its magnetic field.
   B) NEUTRINOS.                       d) solar flares.

8. The hottest layer of the sun's atmosphere is easiest to see
   a) at sunspot minimum.
   b) with radio telescopes.
   c) with a solar filter on a telescope.
   D) DURING A TOTAL ECLIPSE.

9. The "dirty snowball" picture was designed to explain
   a) the black-and-white faces of Saturn's moon Iapetus.
   b) the surfaces of icy moons of the outer planets.
   C) THE CHEMICAL MAKEUP OF COMETS AND THEIR RELATION TO METEOR SHOWERS.
   d) the directions and elongated shapes of comet orbits.

10. Meteor showers are associated with
   a) breakup of asteroids in the upper atmosphere.
   b) dust generated by asteroid collisions.
   C) DUST ORIGINATING IN COMET TAILS.
   d) debris generated by asteroid impacts on other planets.