Single ground! The ground is single among the nine planets which surround the sun.It are only planet which can support the life, because it has enough oxygen in its atmosphere and abundant water in fact, seen space, glances almost entirely blue.This of the ground is because approximately 70% of its surface are under water, submerged under four enormous oceans: the oceans.Land Pacifique, Atlantic, Indian and Arctic composes approximately 30% of the surface.It of the ground is divided into seven continental masses of variable forms and the sizes called the continents.These are, of larger with smaller: Asia, Africa, North America, South America, Antartica, Europe and Australia.Wet ground: The tropical tropical forests develop in the sectors close to the equator, where the weather is wet and heats all the round year. Although they cover just 7% of the ground of the ground, these thick and wet forests form the richest ecosystems on the factory of planet.More and of the species of animal are found here that anywhere elsewhere on ground. The ground dries of •: The deserts are among the most inhospitable places on planet.Some deserts are hot choking, others freeze the cold, but they have a joint thing - they are very dry. Species very little factory and animal can survive in these hard conditions. The coldest continent and driest of the world, Antartica, is a cold desert. Aqueous world: The oceans and the seas of the ground cover more than 367 million square kilometre which is twice the surface of Mars and nine times the surface of the moon. Under the lies of waves of the largest ocean and more the still unknown landscape on Earth.Here are the coral reefs, enormous, open deep plains, throats, and the greatest range of mountain on ground - the semi-Atlantic Edge-which extends almost from the post to the post. •