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Chapter 3, Lessons 1 and 2
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1.
Asteroid
Rock that revolves around the sun
18.
Saturn
2.
Comet
Mixture of frozen gases, ice, dust, and rock that
move in an orbit around the sun.
Gas giant known for its spectacular ring system,
no solid surface, 53 known moons
19.
Solar
System
Made up of a star and the objects that surround it
20.
Terrestrial
Planets
Another name for inner planets - refers to their
rocky structure
21.
Uranus
Ice giant that looks like it is rotating on its side
because of the angle of its axis, rotates in
retrograde, faint ring system, 27 moons
22.
Venus
Slightly smaller than Earth, rocky cratered and
volcanic, thick toxic atmosphere, spins in
retrograde, no moons, no rings
Dwarf
Planet
Spherical object that orbits the sun and does not
clear its orbit of smaller debris (Pluto, Eris,
Ceres)
4.
Earth
Rocky, solid surface with mountains, valleys,
canyons, and plains
5.
Galilean
Moons
Jupiter's largest moons. They are named
Ganymede, Callisto, Io, and Europa
6.
Gaseous
Planets
Another name for the outer planets - refers to
their gaseous structure
7.
Inner
Planets
Four planets closest to the sun. These planets
are all:
- made of rock
- do not have rings
- have 2 moons or less
- are smaller than the outer planets
- are hotter than the outer planets
8.
Jupiter
Largest planet in our Solar System, has 50
known moons, faint ring system, great red spot is
a storm
9.
Mars
Solid rocky surface with volcanoes, impacts,
crustal movements, and dust storms that alter its
surface, two moons, no rings, known as the red
planet due to iron minerals in soil
10.
Mercury
Smallest planet in our Solar System, closest
planet to the sun, solid and cratered surface, no
moons, no rings
11.
Moon
Natural object that orbits a planet
12.
Neptune
Ice giant that is farthest from the sun, methane
gives this planet its blue appearance, 13 moons
named after Greek myths, 6 rings
13.
Outer
Planets
Four planets beyond the asteroid belt. These
planets are all:
- made of gases
- have rings
- have 10 moons or more
- are larger than the outer planets
- are colder than the outer planets
14.
Planet
Large object that orbits a star
15.
Retrograde
Motion
Spinning from East to West as opposed to West
to East. Planets that spin in retrograde appear to
be spinning backwards. These planets are Venus
and Uranus.
16.
Revolution
One complete trip around the sun. The length of
the planet's year is dependent on the time it
takes to complete one revolution.
17.
Rotation
One complete spin on an axis. The length of a
planet's day is dependent on the time it takes to
complete one revolution.
3.