ASTRO 205 QUIZ 1 QUESTIONS AND ANSWERS RATED A.

ASTRO 205 QUIZ 1 QUESTIONS AND
ANSWERS RATED A.
1. Suppose we look at two distant galaxies: Galaxy 1 is twice as far
away as Galaxy 2. In that case, which of these statements must be
true?
1- Galaxy 2 must be twice as old as Galaxy 1.
2- Galaxy 1 must be twice as big as Galaxy 2.
3- We are seeing Galaxy 1 as it looked at a later time in the history of the
Universe than Galaxy 2.
4-We are seeing Galaxy 1 as it looked at an earlier time in the history of
the Universe than Galaxy 2.
Correct Answer -5
2. Astronomers infer that the Universe is expanding because distant
galaxies all appear to __________________.
1- be growing in size
2-rotate rapidly
3-be made mostly of dark matter
4-be moving away from us, with more distant ones moving faster
Correct Answer -be moving away from us, with more distant ones moving
faster
3. On the Cosmic Calendar, the entire 14-billion-year history of the
Universe is compressed into a single calendar year. The Big Bang
occurs at the stroke of midnight on January 1, and right now is
midnight one year later.