Test Bank for Horizons Exploring the Universe, 15th Edition by Michael A. Seeds

Name: Class: Date:

Chapter 01 - Here and Now
True / False

1. The average distance from Earth to the Sun is 1 AU.
a. True
b. False
ANSWER: True

2. The nearest star is 1 ly from the solar system.
a. True
b. False
ANSWER: False

3. A light-year is the distance light travels in one year.
a. True
b. False
ANSWER: True

4. A kilometer contains 1 million meters.
a. True
b. False
ANSWER: False

5. The Sun is a star in the Milky Way Galaxy.
a. True
b. False
ANSWER: True

6. The metric system is a decimal system.
a. True
b. False
ANSWER: True

7. 3.42 × 107 km is the same as 3.42 × 104 m.
a. True
b. False
ANSWER: False

8. The numbers 9.81×105 and 981,000 are equivalent.
a. True
b. False
ANSWER: True

9. An astronomical unit is larger than a light-year.
a. True
b. False
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,Name: Class: Date:

Chapter 01 - Here and Now

ANSWER: False

10. A supercluster refers to a large group of stars within the Milky Way.
a. True
b. False
ANSWER: False

11. The Milky Way and the Milky Way Galaxy are the same thing.
a. True
b. False
ANSWER: False

12. Our Sun was born in a spiral arm.
a. True
b. False
ANSWER: True

13. Life began on land.
a. True
b. False
ANSWER: False

14. Life and human life are the same thing.
a. True
b. False
ANSWER: False

15. The scientific method is a simple, mechanical way of grinding facts into understanding.
a. True
b. False
ANSWER: False

16. The relative distance between the planets increase with distance from the Sun.
a. True
b. False
ANSWER: True

17. The Moon is a large moon compared to the size of its host planet.
a. True
b. False
ANSWER: True

18. The Milky Way Galaxy is alone, that is, not a part of a group or cluster.
a. True
b. False
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,Name: Class: Date:

Chapter 01 - Here and Now

ANSWER: False

19. The Big Bang is a point in space.
a. True
b. False
ANSWER: False

20. The solar system is larger than the Milky Way Galaxy.
a. True
b. False
ANSWER: False

21. The name of our planetary system orbiting our Sun is called the Milky Way Galaxy.
a. True
b. False
ANSWER: False

22. Our universe is the planets orbiting the Sun, the Sun, and all the asteroids and comets in between and around our
system.
a. True
b. False
ANSWER: False

Multiple Choice

23. How many centimeters are there in one kilometer?
a. 100
b. 1000
c. 10,000
d. 100,000
e. 1×106
ANSWER: d

24. Scientific notation is used in science because
a. it makes it easy to write big or small numbers.
b. all astronomical distances are expressed in metric units.
c. it makes conversions between units easy.
d. All of the other choices are correct.
ANSWER: a

25. The average distance from Earth to the Sun is
a. 1 lee.
b. 1 million km.
c. 1 million miles.

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, Name: Class: Date:

Chapter 01 - Here and Now

d. 1 billion km.
e. 1 AU.
ANSWER: e

26. The Sun is
a. a star which generates its own energy.
b. 1 AU from Earth.
c. visible by its own light emission.
d. All of the other choices are correct.
ANSWER: d

27. The diameter of a typical star (the Sun) is approximately ____ times larger than the diameter of a typical planet (the
Earth).
a. 10
b. 100
c. 1000
d. 10,000
e. 100,000
ANSWER: b

28. A typical galaxy like our Milky Way galaxy contains
a. primarily planets.
b. gas only.
c. stars (some with planets), gas, and dust.
d. a single star and planets.
e. thousands of superclusters.
ANSWER: c

29. The radius of the Moon's orbit is about ____ times larger than the radius of Earth.
a. 0.6
b. 6
c. 60
d. 600
e. 6000
ANSWER: c

30. Choose the best answer. The Milky Way Galaxy
a. is part of a cluster of a few dozen galaxies.
b. is about 200 ly in diameter.
c. is the largest known object in the universe.
d. is part of a cluster of a few dozen galaxies, is about 200 ly in diameter, and is the largest known object in the
universe
e. is part of a cluster of a few dozen galaxies and is the largest known object in the universe
ANSWER: a
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