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Planets and Sun

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

____ has colorful clouds in bands of white, red, tan, and brown.
a.
Saturn
c.
Jupiter
b.
Uranus
d.
Neptune
 

 2. 

Vaporized gases and released dust form a bright cloud called a(n) ____ around the solid part of a comet.
a.
coma
c.
heart
b.
core
d.
nucleus
 

 3. 

Two of the inner planets are ____.
a.
Venus and Saturn
c.
Earth and Pluto
b.
Mars and Venus
d.
Mercury and Jupiter
 

 4. 

Small pieces of rock that enter Earth's atmosphere at speeds of 15 to 70 km/s and burn up are called ____.
a.
stars
c.
meteorites
b.
meteors
d.
asteroids
 

 5. 

____ are pieces of rock that strike the surface of a moon or planet.
a.
asteroids
c.
Meteor showers
b.
Comets
d.
Meteorites
 

 6. 

This planet has no true atmosphere.
a.
Mars
c.
Jupiter
b.
Saturn
d.
Mercury
 

 7. 

Pluto is different from the other outer planets because ____.
a.
it may have been a moon of an inner planet that escaped
b.
it formed near Earth and moved outward
c.
it is close to the inner planets
d.
it is now classified as a dwarf planet
 

 8. 

A comet develops a coma because of ____.
a.
gravity
c.
the Oort Cloud
b.
Earth's atmosphere
d.
heat from the Sun
 

 9. 

Scientists hypothesize that the Sun formed ____.
a.
less than a billion years ago
c.
less than a million years ago
b.
about 5 billion years ago
d.
from a chunk of Jupiter
 

 10. 

The structure of a comet is considered to be like a large, ____, or a mass of frozen ice and rock.
a.
solid planet
c.
cratered moon
b.
dirty snowball
d.
none of the above
 

 11. 

____ is the largest planet in the solar system, is the fifth planet from the Sun, and has colorful clouds. One of its 17 moons is the most volcanically active object in the solar system. The planet has a liquid ocean and atmosphere comprised mostly of hydrogen and helium. It may have a rocky core, although its extreme pressure and temperature would make the core different from any rock on Earth.
a.
Jupiter
c.
Uranus
b.
Saturn
d.
Neptune
 

 12. 

Solar energy trapped by gases in Venus's atmosphere causes ____.
a.
clouds to form
c.
the greenhouse effect
b.
its slow rotation
d.
a cooling effect
 

 13. 

The Sun was formed when energy caused by ____ in the center of the cloud of gas and dust radiated into space.
a.
nuclear fusion
c.
gravity
b.
evaporation
d.
none of the above
 

 14. 

Water is found as a solid, liquid, and gas on ____.
a.
Mercury
c.
Earth
b.
Venus
d.
Mars
 

 15. 

People once believed that all planets and stars orbited around ____.
a.
Mercury
c.
Earth
b.
Venus
d.
Mars
 

 16. 

Galileo used his telescope to discover evidence for the Sun-centered model of the solar system. This evidence included all of the following EXCEPT ____.
a.
Venus going through phases
b.
Venus revolving around the Sun, not Earth
c.
the discovery of Neptune and Pluto
d.
both a and b
 

 17. 

Mercury is the ____ planet from the Sun.
a.
fourth
c.
second
b.
third
d.
first
 

 18. 

____ is the third planet from the Sun.
a.
Mercury
c.
Earth
b.
Venus
d.
Mars
 

 19. 

The order of the inner planets outward from the Sun is ____.
a.
Mercury, Earth, Venus, and Mars
c.
Mars, Venus, Earth, and Mercury
b.
Mercury, Venus, Earth, and Mars
d.
Earth, Venus, Mars, and Mercury
 

 20. 

The orbits of ____ lie closer to the Sun than does Earth's orbit.
a.
Mercury and Mars
c.
Mars and Venus
b.
Mercury and Venus
d.
Jupiter and Mercury
 



 
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