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ASTRO 205 QUIZ 1 QUESTIONS AND ANSWERS RATED A.
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ASTRO 205 QUIZ 1 QUESTIONS AND ANSWERS RATED A.
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ASTRO 205 QUIZ 1 QUESTIONS ANDANSWERS 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.
, Match the following major events to their (approximate) time on the
Cosmic Calendar.
Correct Answer -
Distances between objects in space are so vast, they are difficult to
comprehend. Therefore, it can be helpful to look at scale models.
Consider a scale model of the Solar System where the Earth-Sun distance
(149,600,000 km) is represented as 1.0 metre. In this scale model, how far
would Jupiter be from the Sun?
Correct Answer -5.2 meters
A typical galaxy is a ___________________.
1- a collection of billions or trillions of stars, bound together by gravity
orbiting a common centre
2- system consisting of one of a few stars orbited by planets, moons, and
smaller objects
3- relatively small, icy object orbiting a star
4-large, glowing ball of gas powered by nuclear energy
nearby object orbiting a planet
Correct Answer -collection of billions or trillions of stars, bound together
by gravity orbiting a common centre
Which of the following best describes what we mean by the Universe?
1-A vast collection of planets, stars, and galaxies.
2-The total matter and energy in existence.
3-The Universe is another name for our Milky Way Galaxy.
4-All the galaxies in all the superclusters.
Correct Answer -The total matter and energy in existence.
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