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Chapter 18 - A Family of Planets

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 
 
Below is a diagram of the orbits of the outer planets. Examine the diagram and answer the questions that follow.
test_extra_credit_files/i0020000.jpg
 

1. 

Which line indicates Jupiter's orbit?
a.
A
c.
C
b.
B
d.
D
 

2. 

Which line indicates the orbit of Uranus?
a.
B
c.
D
b.
C
d.
E
 

3. 

Which line indicates Saturn's orbit?
a.
B
c.
D
b.
C
d.
E
 

4. 

Which line indicates Pluto's orbit?
a.
B
c.
D
b.
C
d.
E
 

5. 

Which line indicates Neptune's orbit?
a.
B
c.
D
b.
C
d.
E
 

6. 

When do annular eclipses occur?
a.
every solar eclipse
b.
when the moon is closest to the Earth
c.
only during full moon
d.
when the moon is farthest from the Earth
 

7. 

Of the following, which is the largest body?
a.
the moon
c.
Mercury
b.
Pluto
d.
Ganymede
 

8. 

Which of the following celestial bodies is most likely to have many craters?
a.
a giant gaseous planet
b.
a white dwarf star
c.
a terrestrial planet with no atmosphere
d.
a terrestrial planet with a thick atmosphere
 

9. 

Annular solar eclipses occur because
a.
the moon reflects more sunlight than the Earth does.
b.
the Earth's shadow is too small to completely cover the moon.
c.
the moon is too far away from the Earth to completely hide the sun.
d.
All of the above
 
 
Below is a diagram of the orbits of the inner planets. Examine the diagram and answer the questions that follow.
test_extra_credit_files/i0120000.jpg
 

10. 

Which line indicates Earth's orbit?
a.
A
c.
C
b.
B
d.
D
 

11. 

Which line indicates Mercury's orbit?
a.
A
c.
C
b.
B
d.
D
 

12. 

Which line indicates the orbit of Venus?
a.
A
c.
C
b.
B
d.
D
 

13. 

Which line indicates the orbit of Mars?
a.
A
c.
C
b.
B
d.
D
 

14. 

Which outer planet is made of mostly ice instead of gas?
a.
Saturn
c.
Neptune
b.
Uranus
d.
Pluto
 

15. 

The amount of time it takes for an object to spin on its axis once is called
a.
period of revolution.
c.
retrograde rotation.
b.
period of rotation.
d.
prograde rotation.
 

16. 

Spinning in a clockwise direction is called
a.
period of revolution.
c.
retrograde rotation.
b.
period of rotation.
d.
prograde rotation.
 

17. 

On Mercury, you would weigh only 38 percent of what you weigh here on Earth. If you weighed 60 kg here on Earth, how much would you weigh on Mercury?
a.
1.6 kg
c.
38 kg
b.
22.8 kg
d.
60 kg
 

18. 

Which of the following is the same for all nine planets?
a.
direction of rotation
c.
direction of revolution
b.
period of rotation
d.
period of revolution
 

19. 

For all nine planets, a year is
a.
365 days.
c.
one period of rotation.
b.
one period of revolution.
d.
Both (a) and (b)
 

20. 

For all nine planets, a day is
a.
24 hours.
c.
one period of revolution.
b.
one period of rotation.
d.
Both (a) and (b)
 

21. 

Which planet has the densest atmosphere?
a.
Earth
c.
Mars
b.
Venus
d.
Mercury
 

22. 

Which of the following was the key to the development of life on Earth?
a.
liquid water
c.
the formation of the moon
b.
magma turning to solid rock
d.
the ozone layer
 

23. 

The Great Red Spot is a
a.
moon.
c.
sun.
b.
storm system.
d.
volcano.
 

24. 

Of all the planets in our solar system, excluding Pluto, which is the smallest?
a.
Earth
c.
Jupiter
b.
Saturn
d.
Mercury
 

25. 

Saturn's rings consist of
a.
phosphorescent gases.
c.
icy particles.
b.
shiny, metallic rocks.
d.
luminous auroras.
 

26. 

Uranus and Neptune are much smaller than Jupiter and Saturn, and yet they have similar densities. This suggests that they
a.
are completely made of gases.
c.
have more water in their interiors.
b.
have more light elements.
d.
All of the above
 

27. 

Which of the following is referred to as the Blue World?
a.
Uranus
c.
Jupiter
b.
Neptune
d.
Mercury
 

28. 

Which of the following is the most likely cause of Uranus's unusual axis of rotation?
a.
irregular magnetic poles
b.
Saturn's gravitational pull when it was twice its current size
c.
a perpendicular orbit to all the other planets' orbits
d.
the impact from a collision with a massive object early in its history
 

29. 

Which of the following moons is the largest relative to its planet?
a.
Charon
c.
Io
b.
Tethys
d.
Luna
 

30. 

Which moon orbits Earth?
a.
Charon
c.
Io
b.
Tethys
d.
Luna
 

31. 

Earth's moon has a lower percentage of heavy elements than the Earth does. Therefore, the moon ____ than the Earth.
a.
has less mass
c.
is less dense
b.
has less volume
d.
is more dense
 

32. 

The composition of the Earth's moon is similar to that of Earth's
a.
crust.
c.
inner core.
b.
mantle.
d.
outer core.
 

33. 

Which statement best explains maria?
a.
Maria is the moon's nickname.
c.
Maria are the moon's lava plains.
b.
Maria are the moon's craters.
d.
Maria is moon dust.
 

34. 

Which of the following statements is TRUE?
a.
During an annular eclipse, the solar corona is visible.
b.
A solar eclipse can be viewed from only a few locations on Earth.
c.
Annular eclipses occur because the moon's orbit is not completely circular.
d.
All of the above
 

35. 

The moons Phobos and Deimos orbit
a.
Venus.
c.
Jupiter.
b.
Mars.
d.
Saturn.
 

36. 

Which planet has the most moons?
a.
Jupiter
c.
Uranus
b.
Neptune
d.
Saturn
 

37. 

Which of Jupiter's four largest moons is the most volcanically active?
a.
Europa
c.
Io
b.
Ganymede
d.
Europa
 

38. 

The little moon, Miranda, that orbits Uranus is very unusual because it
a.
has an extremely thick atmosphere.
b.
may have broken apart in the past and then come together again.
c.
revolves around the planet in retrograde.
d.
has an extremely dark surface that reflects very little light.
 

39. 

Neptune's moon, Triton, is unusual because it
a.
has an extremely thick atmosphere.
b.
may have broken apart in the past and then come together again.
c.
revolves around the planet in retrograde.
d.
has an extremely dark surface that reflects very little light.
 

40. 

Which statement best describes Pluto and its moon, Charon?
a.
They both have the same period of rotation.
b.
They both have the same period of revolution.
c.
Charon's period of rotation is the same as Pluto's period of revolution.
d.
Charon's period of revolution is the same as Pluto's period of rotation.
 

41. 

Objects smaller than ____ across usually burn up in Earth's atmosphere and do not pose a risk to Earth's surface.
a.
10 m
c.
100 km
b.
10 km
d.
1000 km
 

42. 

An impact large enough to cause a global catastrophe—such as the extinction of the dinosaur—is estimated to occur once every ____ years on average.
a.
1,000 to 2,000
c.
1 million to 2 million
b.
30,000 to 50,000
d.
30 million to 50 million
 



 
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