1. The Structural Parts of the Earth
... into the atmosphere. A small portion of the water in the hydrosphere is fresh. This water flows as precipitation from the atmosphere down to Earth's surface, as rivers and streams along Earth's surface, and as groundwater beneath Earth's surface. Most of Earth's fresh water, however, is frozen. Ninety-seven percent of Earth's water is salty. The salty water collects in deep valleys along Earth's surface. These ... large collections of salty water are referred to as oceans. The image above depicts the different temperatures one would find ... edge of one plate is gradually destroyed by t...
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- Grade Level: High School