what are the five characteristics of the earth?
['Plate Tectonics Keep the Planet Comfortable: ... ', 'Earth is Almost a Sphere: ... ', 'Earth is Mostly Iron, Oxygen and Silicon: ... ', "70% of the Earth's Surface is Covered in Water: ... ", "The Earth's Atmosphere Extends to a Distance of 10,000 km: ... ", "The Earth's Molten Iron Core Creates a Magnetic Field:"]