The general theory of water flow describes the behavior of water at melting at the base of a glacier or melting ice sheet. It observes the flow of water in the presence of Rothlisberger channels, channels carved upward f... More »

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The pressure flow theory states that water with food molecules inside of it moves through the phloem of a plant through pressure. This theory is meant to explain how food moves around inside plants. More »

To calculate the water flow rate, square the pipe's diameter, and then multiply that number by pi, .25 and the velocity of the water flow. For example, a pipe with a diameter of 3 inches, or .25 feet, and a water velocit... More »

Encyclopædia Britannica states that many pieces of evidence support the sea floor spreading theory of plate tectonics, including increased heat flow along mid-ocean ridges, geomagnetic anomalies near ocean ridges, thickn... More »

According to Curiosity from Discovery, a delta forms when particles of mud, fine sand and gravel amass at the base of a river where it enters a larger body of water like a gulf or large lake. Deltas build and extend slow... More »

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Large rocks deposited by melting glaciers are called "glacial erratics," after the Latin word "errare" or "to wander." Erratics can be carried hundreds or thousands of miles by a glacier before they are deposited. More »

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The largest glacier in the world is Lambert Glacier, as of 2014. It has a maximum width of about 60 miles and spans a total length of approximately 270 miles. This glacier is over 8,000 feet thick at its deepest point. More »