The inner planets:
1. Mercury
2. Venus
3. Earth
4. Mars
Outer planets are:
1. Jupiter
2. Saturn
3. Uranus
4. Neptune
5. Pluto
Differences:
1. Rings
2. No. of moons
3. Days it took to revolve around the sun
4. Rotation cycle
5. Size
6. Density
Similarities:
1. Made of matter
2. Both have core, mantle and crust
3. Round in shape
4. Has gravity
