Answer:
1. The inner planets comprises Mercury, Earth, Venus, and Mars, while the Outer planets comprises Saturn, Jupiter, Neptune, and Uranus.
2. The inner planets are small in size, while the outer planets are huge in size.
3. The inner planets exhibit solid surfaces and no or thin atmospheres, while the outer planets are the balls of gas with no surface.
4. The inner planets exhibits greater density, while the outer planets exhibit smaller density.
5. The inner planets spins slowly, while the outer planets spin quickly.
6. The inner planets comprises few moons, while the outer planets comprises many moons.
7. The inner planets have no rings, while the outer planets comprises rings.