because they are smaller and closer to the sun
the inner planets are sometimes called Terrestrial Planets
The inner planets are Mercury, Venus, Earth, and Mars. Because of the most part, they have rocky terrain, they are also called Terrestrial Planets.
Because they are in the asteroid belt. The planets that are outside of the asteroid belt are called the outer planets.
no the inner planets are called "inner" planets bcuz there closer
Mercury, Venus, Earth, and Mars are called the inner planets.
There are four planets called the "inner planets".Of those, Mercury is the innermost planet.From the sun the planets areMercuryVenusEarthMarsJupiterSaturnUranusNeptunePluto
The inner planets
terrestrial planets
the rocky planets
The four inner planets, Mercury, Venus, Earth, and Mars, are also known as the rocky planets.
The four planets closest to the sun are called the inner planets. They are Mercury, Venus, Earth, and Mars. The asteroid belt lies between the inner and outer planets.
No that's what the four outer planets are called.