How can Mars, a planet with so little atmosphere, have so much wind?
What will be an ideal response?
Question 2A major advantage of a Newtonian reflector over a refractor is:
A) its compact size.
B) the elimination of chromatic aberration.
C) there are only two lenses to grind.
D) the central hole in the mirror is smaller.
E) the elimination of the secondary mirror.
Question 3What was detected on Halley's Comet and observed on Hale-Bopp that imply the possibility of life on Earth originating in space?
A) DNA
B) amino acids
C) organic material
D) nucleotide bases
E) ammonia
Question 4Gaps in the asteroid belt (often called Kirkwood gaps) are caused by
A) tidal forces from the Sun.
B) tidal forces from Jupiter.
C) the competing gravitational tugs of Mars and Jupiter.
D) orbital resonances with Jupiter.
Question 5Most of the galaxies in the Local Group are:
A) big spirals like our Galaxy and M31.
B) small spirals like M33 and the LMC.
C) small irregulars like the Magellanic Clouds.
D) active galaxies like Centaurus A.
E) small ellipticals like the companions to M31 in Andromeda.
Question 6This design involves only one optical surface, a concave mirror.
A) prime focus reflector
B) Newtonian reflector
C) Cassegrain reflector
D) Gregorian reflector
E) refractor
Quick Reply
