As rain is formed in the atmosphere, it absorbs carbon dioxide, making it slightly acidic when it falls on the land. This rain physically and chemically erodes the rock and carries various minerals and salts as it runs o... More »

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Ocean water is salty primarily due to the large amounts of chloride and sodium on land which are dissolved by rainfall and carried to the sea by rivers and streams. Hydrothermal vents and underwater volcanoes located on ... More »

Only about 30 percent of the Earth's surface is dry land, oceans make up the remaining 70 percent. Earth's oceans are home to hundreds of thousands of marine life forms, but because most of the ocean depths remain unexpl... More »

Ocean water is salty primarily due to the large amounts of chloride and sodium on land which are dissolved by rainfall and carried to the sea by rivers and streams. Hydrothermal vents and underwater volcanoes located on ... More »

Thunderstorms form when rapidly rising warm air brings moisture to higher parts of the atmosphere, then water vapor cools and condenses into droplets that fall to the Earth as rain. The process of rising warm air is call... More »

Air is made up of oxygen, nitrogen and carbon dioxide. It consists of approximately 78 percent nitrogen, 20 percent oxygen and trace amounts of carbon dioxide. More »

Monsoons are seasonal shifts in winds where the land and ocean intersect. Monsoons usually bring higher than usual amounts of rainfall to an area and sometimes cause massive flooding. More »

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