Universe Solar System Stars and Galaxies 8th Edition by Seeds - Test Bank

,CHAPTER 1—HERE AND NOW


MULTIPLE CHOICE

1. How many centimeters are there in one kilometer?
a. 100
b. 1,000
c. 10,000
d. 100,000
e. 1106
ANS: D PTS: 1

2. 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 above
ANS: A PTS: 1

3. The average distance from Earth to the sun is
a. 1 ly.
b. 1 million km.
c. 1 million miles.
d. 1 billion km.
e. 1 AU.
ANS: E PTS: 1

4. 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 above.
ANS: D PTS: 1

5. 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
ANS: B PTS: 1

6. 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.

, ANS: C PTS: 1

7. 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
ANS: C PTS: 1

8. The Milky Way Galaxy
a. contains about 100 billion stars.
b. is about 200 light-years in diameter.
c. is the largest known object in the universe.
d. all of the above.
e. a and c.
ANS: A PTS: 1

9. 2.9107 is the same as
a. 2.9 thousand.
b. 29 thousand.
c. 290 thousand.
d. 2.9 million.
e. 29 million.
ANS: E PTS: 1

10. 1.65 billion is the same as
a. 1.651012.
b. 1.65109.
c. 1.65106.
d. 1.65105.
e. 1.65103.
ANS: B PTS: 1

11. Arrange the following distances in order from smallest to largest.

I. kilometer
II. light-year
III. yard
IV. Astronomical unit

a. I, II, III, IV
b. IV, III, II, I
c. III, I, IV, II
d. II, I, IV, III
e. III, I, II, IV
ANS: C PTS: 1

12. It takes light 1.3 seconds to travel from the moon to Earth and 8 minutes to travel from the sun to
Earth. Which of the following statements is true?

, a. The sun is 6.2 times further from Earth than the moon.
b. The sun is 10 times further from Earth than the moon.
c. The sun is 0.16 times further Earth than the moon
d. The sun is 0.10 times further from Earth that the moon.
e. The sun is 370 times further from Earth than the moon.
ANS: E PTS: 1

13. If light takes 8 minutes to travel from the sun to Earth and over 4 hours to travel from the sun to the
planet Neptune, what is the distance from the sun to Neptune?
a. 5 AU
b. 30 AU
c. 30 ly
d. 5 ly
e. 0.6 ly
ANS: B PTS: 1

14. In the diagram below, what is the diameter of Mercury?




a. about 240 km
b. about 2400 km
c. about 24,000 km
d. about 240,000 km
e. about 2.4106 km
ANS: B PTS: 1

15. In the diagram below, what is the diameter of Jupiter?




a. about 7.0104 km
b. about 7.0105 km
c. about 1.4104 km
d. about 1.4105 km
e. about 3.5106 km
ANS: D PTS: 1

16. Earth has a radius of about 6400 km, the sun has a radius of about 7.0105 km, and a rubber ball has a
radius of 6.4 cm. If you were to construct a scale model of the solar system using the rubber ball to
represent Earth, what is the radius of a ball needed to represent the sun in your model?
a. 7.0105 cm