Planets in order from the sun
Earth
Earth has more exposed water than land and is the only planet know to have life on it.
Gas Giants
Gas giants are large planets that contain more than 10 times the mass of Earth.
Jupiter
Jupiter is the largest planet in the solar system, but it spins very quickly on its axis.
Mars
Mars is the home of "Olympus Mons", the largest volcano found in the solar system.
How to remember them
Mary/Mercury Visits/Venus Each/Earth Monkey/Mars Just so/Jupiter She/Saturn Understands/Uranus Needs/Neptune
Mercury
Mercury takes 59 days to spin completely 88 days to circle all the way around the Sun.
Saturn
Saturn is the second biggest planet, but it's also the lightest planet.
Neptune
Since Neptune was discovered in 1846 that means in 2011 it made it's first lap around the sun since it was discovered. That's 165 Earth years!
Terrestrial Planets
Terrestrial Planets are made mostly of rocks and metals, with solid surfaces and atmospheres that range from thick (on Venus) to very thin (on Mercury).
Uranus
Uranus' axis is at a 97 degree angle, meaning that it orbits lying on its side.
Venus
Venus is the brightest planet in our sky and can sometimes be seen if you know where to look.
My recource
http://www.kidzone.ws/planets/