O que é solo?
Autor: Turma 8B | Publicado: 2011-06-10T05:51:00-07:00

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 <![endif]-->  O solo é uma porção de rochas minúsculas que não podem ser vistas a olho nu.Essas rochas são sedimentos que como passar do tempo e com a ação da natureza, vem se transformando em uma massa fofa e macia que é o solo ou como costumamos chamar de terra.O planeta terra se formou 4,54 bilhões de anos atrás, ele é composto de 1/4 de terra é 3/4 de água. Então como pode se chamar planeta terra, se à, mas água?O planeta terra chama-se assim, pois graças ou solo camada que se encontra na crosta terrestre onde é possível a existência da vida humana denominamos nosso planeta de Terra.&nbsp;
&nbsp;&nbsp;http://seumadruga72.files.wordpress.com/2010/05/planeta-terra.jpg