AY101-002                   Quiz #1                       Spring 2009
1. Early skywatchers distinguished Mercury, Venus, Mars, Jupiter, and Saturn
because of their 
a) brightness.  b) size. c) temporary visibility.  D) UNUSUAL (AND ERRATIC) MOVEMENTS.

2. We experience seasons on Earth because of
a) the shape of our orbit.       B) THE ANGLE BETWEEN OUR ORBIT AND EQUATOR.
c) the Moon's influence.        d) the transparency of our atmosphere.

3. The Moon's phases happen because of
a) the Earth's shadow.        B) THE MOON'S ORBIT  AND DIRECTION OF SUNLIGHT.
c) its synchronized orbit and rotation.      d) differences between its two hemispheres.

4. One of the first clues to the shape of the Earth came from
A) LUNAR ECLIPSES.                                 b) Newton's discovery that gravity acts in all directions.
c) surveying of distances across it.         d) the fact that stars rise and set like the Sun.

5. Which of these is not simply a reflection of the Earth's motion?
A) LUNAR PHASES.                                       b) Sunrise and sunset.
c) Changes in stars we can see through year.        d) The changing seasons.

ASSESSMENT QUESTIONS - NOT GRADED

6. The planets closest to the Sun have the largest proportion of
A) METALS.     b) ices.     c) rock.          d) hydrogen and helium.  

7. Cold dust particles in deep space are best seen with telescopes using
a) radio waves.   b) ultraviolet.  C) INFRARED TELESCOPES.    d) X-rays.