Mostly their composition. Inner planets are made of heavy solid materials.
Outer planets are made of lighter elements, primarily gases.
Also, there is the Asteroid Belt, which is between the inner and outer planets.
The general answer is the asteroid belt, however, technically, that is wrong. The dividing line is called the ice line [See related question] where it was, then, cold enough for the Giant outer planets to form.
An asteroid belt divides the inner planets (Mercury,Venus,Earth,Mars) and outer planets (Jupiter,Saturn,Uranus,Neptune).
The asteroid belt, which lies between Mars and Jupiter, divides the inner and outer planets.
the dividing line is the asteroid belt after the plnet mars but cant remember what its called :s
An asteroid belt.
The Asteroid Belt
An inner planet is mostly made of iron and has more mass than outer planets, outer planets are mostly made of gasses, makeing them have less mass. The inner planets are the planets between the asteroid belt and the sun
sorta there are inner and outer planets the inner planets are alike and outer planets are alike to but inner and outer planets are different.
Pluto is the only "planet" that isn't a planet. Well I think that the IAU still have not answered the question WHAT MAKES A PLANET A PLANET? Is it a certain size or something? Comment : The IAU have defined a planet. The definition is mainly about size, but it's not simple: 1) The object must be big enough for gravity to have formed it into a (roughly) spherical shape. 2) The object must be by far the largest object in the neighbourhood of its orbit. Pluto qualifies on 1) but fails on 2). Also, Venus and Mercury are sometimes called "morning stars" or "evening stars", but they are planets.
The inner core has the most or highest amount of density (iron/nickel).
Cavity walls are made up of an outer wall (ie brick) and studs or concrete blocks inner supporting wall. The cavity in between (usually a minimum of an inch) is a space for air circulation and also to keep rain from getting to the outside surface of the inner wall.
The inner planets are closer together than the outer planets are.
Between the orbit of Mars and Jupiter, there is the asteroid belt. This is made up of millions of small rocks that are in a direct orbit around the sun.
The distances between the inner planets is smaller than the distances between the outer planets.
The distances between the inner planets is smaller than the distances between the outer planets.
As the names suggest, the inner planets are closer to the Sun than the outer planets.
the four inner planets (mercury, venus, earth and mars) are called the inner planets because they are quite close to the sun. where as the four outer planets ( jupiter, saturn, uranus and neptue) are a lot further away from the sun.
The asteroid belt is in-between the inner and outer planets.
The inner planets are closer together than the outer ones.
they are the same
Inner planets are mostly rock and outer planets are mostly gas.
The inner planets are closer together than the outer ones.
An asteroid belt.