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Name: ________________________ Period: ___________________ Date: __________
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Chapter 23 Section 1
Ch 23 - Section 1 > Pages 644-648
Multiple Choice. Identify the letter of the choice that best completes the statement or answers the question.
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An estimated 99.85 percent of the mass of our solar system is contained within _______.
a.
Jupiter
c.
Saturn
b.
the Sun
d.
Mars
Which two planets lie outside the “orbital plane” of the other seven planets?
a.
Mercury and Pluto
c.
Mars and Jupiter
b.
Venus and Earth
d.
Saturn and Uranus
Which of the following is a complete list of terrestrial planets?
a.
Mercury, Venus, Earth, Jupiter
c.
Mars, Earth, Venus, Mercury
b.
Earth, Venus, Jupiter, Saturn
d.
Jupiter, Saturn, Uranus, Neptune
Which of the following is a complete list of Jovian planets?
a.
Mercury, Venus, Earth, Jupiter
c.
Mars, Earth, Venus, Mercury
b.
Earth, Venus, Jupiter, Saturn
d.
Jupiter, Saturn, Uranus, Neptune
Which of the following groups has planets that are most similar in composition?
a.
Earth, Jupiter, Saturn
c.
Mercury, Earth, Mars
b.
Earth, Mars, Saturn
d.
Venus, Mars, Jupiter
What is the density of the terrestrial planets compared to water?
a.
five time smaller
c.
five times greater
b.
one and a half times greater
d.
about the same
The planets, traveling outward from the sun, are ____________.
a.
Mercury, Venus, Earth, Mars, Saturn, Jupiter, Uranus, Neptune,
and Pluto.
c.
Mercury, Venus, Earth, Jupiter, Mars, Saturn, Uranus, Neptune,
and Pluto.
b.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus,
and Pluto.
d.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune,
and Pluto.
One way the outer planets differ from the inner planets is that the outer planets ______.
a.
produce nuclear fission
c.
are formed by unknown gases
b.
are less dense
d.
have fewer moons
The diameter of Saturn is almost ten times that of the Earth, yet its density is much less. This can best be explained by the fact that Saturn ____.
a.
is farther from the sun
c.
has a shorter period of rotation
b.
is a gaseous planet
d.
has a ring around its center
How many known satellites does Mars have?
a.
1
c.
5
b.
2
d.
0
Which of the following is proportionally more abundant on terrestrial planets than on Jovian planets?
a.
hydrogen
c.
methane
b.
silicate minerals
d.
ammonia ice
The Jovian planets contain a large percentage of the gases ____. **
a.
nitrogen and argon
c.
oxygen and nitrogen
b.
hydrogen and helium
d.
hydrogen and oxygen
c.
Oort cloud
A cloud of dust and gas in space is called a ________.
a.
nebula
b.
hydrogen cloud
d.
asteroid belt
d.
solar theory
The formation of the solar system from a huge cloud of dust and gases is called the ____. **
a.
protoplanet theory
b.
nebular theory
c.
planetesimal theory
During the formation of the solar system, colliding matter formed small, irregular shaped bodies called _______.
a.
planets
c.
plants
b.
planetesimals
d.
planetroids
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