GEOLOGY

Detailed explanation-1: -From its source, a river flows downhill as a small stream. Precipitation and groundwater add to the river’s flow. It is also fed by other streams, called tributaries.

Detailed explanation-2: -Flowing water finds its way downhill initially as small creeks. As small creeks flow downhill they merge to form larger streams and rivers. Rivers eventually end up flowing into the oceans. If water flows to a place that is surrounded by higher land on all sides, a lake will form.

Detailed explanation-3: -River is a large natural stream of flowing water. Eventually all this water from rivers and streams will run into the ocean.

Detailed explanation-4: -Antarctica river There’s a river that flows uphill beneath one of Antarctica’s ice sheets, according to Robin Bell, a professor of geophysics at Columbia University’s Lamont-Doherty Earth Observatory in New York.