Reason: The reason why Earth is an inner planet is because there are 4 inner planets and 4 outer planets. Inner planets in order is Mercury, Venus, Earth, Mars. Outer planets in order is Jupiter, Saturn, Uranus, and Neptune (Pluto was discovered a dwarf planet, which is further than Neptune.
The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth and Mars. After an asteroid belt comes the outer planets, Jupiter, Saturn, Uranus and Neptune so A
