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Inner and Outer Planets

Across
A planet must be rounded by its own ______.
Outer planets are described as ______.
___ planets are colder.
Time it takes for a planet to orbit the sun.
Inner planet description
Separates the inner and outer planets.
To be considered a planet its path must be ____.
Time it takes for a planet to spin on its axis.
Down
A planet's year.
Inner planets have the potential for liquid _______.
Outer planets have these.
Outer planets have many _____.
The size of inner planets compared to the outer planets.
The surface of inner planets is _____.
Larger planets have a greater ____ force.
Inner planets are often called ____ planets.
The ____ the planet is to the sun, the shorter the revolution period or year.
A planet's day.
To be considered a planet it must orbit one of these.
Inner planets contain many ____ materials.