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The Solar System
The Solar System
asteroid
(noun)
an irregularly shaped
rock that orbits the Sun
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The Solar System
The Solar System
asteroid belt
(noun)
the area in space
between Mars and
Jupiter where most
asteroids orbit together
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The Solar System
The Solar System
atmosphere
(noun)
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a layer of gases
surrounding a planet,
star, or moon
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The Solar System
The Solar System
a space object made
comet
(noun)
of ice and dust that orbits
a star and develops
a long, bright tail
as it nears its star
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The Solar System
The Solar System
core
(noun)
the center of an object
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The Solar System
The Solar System
crater
(noun)
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a hole in the ground
caused by the impact of
an object from space
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The Solar System
The Solar System
a nearly round object
dwarf planet
(noun)
that orbits a star,
is smaller than a planet,
and is not a satellite
of another object
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The Solar System
The Solar System
Earth
(noun)
the third planet
from the Sun;
the planet we live on
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The Solar System
The Solar System
gas
(noun)
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a substance with no fixed
volume or shape that
can expand freely
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The Solar System
The Solar System
gas giant
(noun)
a large planet that
is mainly made up
of gases
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The Solar System
The Solar System
gravity
(noun)
the force that pulls
all objects toward
each other
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The Solar System
The Solar System
helium
(noun)
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the second lightest
chemical element;
often a gas
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The Solar System
The Solar System
hydrogen
(noun)
the lightest chemical
element; often a gas
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The Solar System
The Solar System
Jupiter
(noun)
the largest planet in our
solar system and the fifth
from the Sun; a gas giant
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The Solar System
The Solar System
an area of our solar
Kuiper Belt
(noun)
system beyond the orbit
of Neptune where
a group of minor planets
and other objects
orbit the Sun
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The Solar System
The Solar System
Mars
(noun)
a small reddish planet
that is fourth from the
Sun; a terrestrial planet
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The Solar System
The Solar System
mass
(noun)
the measure of the
amount of matter
in an object
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The Solar System
The Solar System
matter
(noun)
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anything that takes up
space and has weight
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The Solar System
The Solar System
Mercury
(noun)
the smallest planet
in our solar system and
the closest to the Sun;
a terrestrial planet
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The Solar System
The Solar System
methane
(noun)
a colorless, odorless,
flammable gas
commonly called
“natural gas”
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The Solar System
The Solar System
moon
(noun)
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a huge ball of rock that
travels around a planet;
a natural satellite
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The Solar System
The Solar System
Moon
(noun)
Earth’s only
natural satellite
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The Solar System
The Solar System
Neptune
(noun)
a large blue planet that
is eighth from the Sun;
a gas giant
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The Solar System
The Solar System
the center of a comet,
nucleus
(noun)
made of small particles
of ice and frozen gas
that can turn to vapor
and form a tail as the
comet nears a star
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The Solar System
The Solar System
orbit
(verb)
to revolve around
another object
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The Solar System
The Solar System
oxygen
(noun)
a gas that has no color,
taste, or smell, and
which people need to live
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The Solar System
The Solar System
planet
(noun)
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a very large object
that orbits a star
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The Solar System
The Solar System
Pluto
(noun)
a dwarf planet that
was discovered in 1930
and that was once
considered a planet
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The Solar System
The Solar System
revolution
(noun)
a single journey
along an orbital path
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The Solar System
The Solar System
rotation
(noun)
a single turn
of something around
an axis or a fixed point;
spinning
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The Solar System
The Solar System
satellite
(noun)
a natural or human-made
object that orbits Earth
or another object
in space
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The Solar System
The Solar System
Saturn
(noun)
a planet with large rings
around it that is sixth
from the Sun; a gas giant
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The Solar System
The Solar System
solar system
(noun)
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a group of objects in
space that orbit a star
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The Solar System
The Solar System
star
(noun)
a body in outer space,
made of hot gases,
that shines in the
night sky
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The Solar System
The Solar System
tail
(noun)
the bright, vaporized
part of a comet that
points away from the Sun
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The Solar System
The Solar System
terrestrial
(adjective)
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like Earth; describes
planets that are rocky
and Earthlike in size
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The Solar System
The Solar System
Uranus
(noun)
a large blue-green planet
that is seventh from the
Sun; a gas giant
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The Solar System
The Solar System
Venus
(noun)
a small planet that
is second from the Sun;
a terrestrial planet
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The Solar System
The Solar System
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