Earth

Earth is our home planet and the only known planet to have life. Earth is 4.6 billion years old. Earth is the 5th largest planet in our solar system. The inner core of Earth is solid but the outter core is known to be liquid. Earth's atmoshpere is made of 78% Nitrogen 21% Oxygen 5% Argon Gas and 5% Carbondioxite. Earth is sorrunded by a magnetic field to stop meteors. A leap year is created by the spin of earth every 365 and a quarter days every 4 years that quarter adds up to another day.