The word Earth when capitalized mean the planet Earth. The third planet from the sun in this solar system. When used without a capital it means dirt, soil, ground. This planet has 7 large land masses which are called continents: Africa, Asia, Antarctica, Australia, Europe, North America and South America. This separates the waters into 5 large areas called oceans. The Arctic which is at the north pole, the Atlantic, the Pacific and the Indian Ocean, with the Antarctic at the south pole. there are many rivers, lakes and streams and smaller islands contained in these areas.