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en.wikipedia.org/wiki/River

A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, creek, brook, ... A river valley that was created from a U-shaped glaciated valley, can often ...

simple.wikipedia.org/wiki/River

1.1 The beginning of a river; 1.2 The middle part of a river; 1.3 The last part of a river ... A young river is often in a V-shaped river bed, and flows quickly downhill over ... The source of a river may be a lake where lots of water from small streams ... As more little streams run in, the main stream gets bigger, until it forms a river.

earthscience.stackexchange.com/questions/5253/how-do-long-rivers-exist

Jul 25, 2015 ... Lakes could be understood as temporary stop in the flow, and it will quickly fill up ... If the river ends up in the ocean, the fact that it is long is just ...

www.mnn.com/earth-matters/wilderness-resources/stories/how-long-does-water-molecule-stay-oceans-lakes-rivers

Apr 8, 2016 ... In rivers, a water molecule won't dawdle as long — just a couple weeks to .... prohibitively expensive until the last decade or so, McGuire says.

water.usgs.gov/edu/watercyclestreamflow.html

Dec 15, 2016 ... Unless the river flows into a closed lake, a rare occurrence, or is ... flowing water bodies, in these pages we'll use "rivers" more often, ... Large rivers may take days to rise and fall, and flooding can last for a number of days.

water.usgs.gov/edu/earthrivers.html

Rivers? Streams? Creeks? They are all names for water flowing on the Earth's surface. As far as our Water ... If water flows to a place that is surrounded by higher land on all sides, a lake will form. ... Saturated, water-bearing materials often exist in horizontal layers ... Page Last Modified: Friday, 02-Dec-2016 12:51: 37 EST.

www.nature.org/ourinitiatives/habitats/riverslakes/threatsimpacts

... our rivers and lakes. Within about 10 years most people on the planet will face life with water shortages. ... Too often we pit one need against another as we use rivers and lakes to meet our needs. We grow food in .... Latest News & Features.

www.homesciencetools.com/a/water-cycle-rivers-science-teaching-tip

Because of this, it is often called the "universal solvent. ... If water acted like most other liquids, lakes and rivers would freeze solid and all life in them would die. ... The water you drank today could have fallen as rain on China last year!

www.quora.com/What-is-the-difference-between-a-lagoon-lake-pond-and-river

It can be a choked lagoon as it is connected with ocean with a long and narrow channel. Lake A lake is a still water body surrounded by land from all sides ...