qwetyuio

El movimiento del agua en el planeta

El agua está en constante movimiento en la naturaleza. La lluvia y la corriente de los ríos son muestras de este movimiento. El agua pasa continuamente de unos lugares a otros del planeta: de la atmósfera cae a la tierra, a los ríos y los mares, y de todos estos, por evaporación, vuelve a la atmósfera y se infiltra en el suelo y el subsuelo circulando comoescorrentía subterránea que alimenta el agua superficial. Este movimiento continuo del agua de unos puntos a otros es lo que se denomina ciclo del agua.

En el ciclo del agua intervienen también los seres vivos. Por ejemplo, los árboles mueven una gran cantidad de agua: la absorben del suelo por sus raíces y pierden una parte de este agua por sus hojas. El aporte de agua a la atmósfera por partede las plantas se denomina evapotranspiración, y es un agente importante en el movimiento del agua entre la biosfera, la atmósfera y la hidrosfera. hnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn-
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