Exam 17: Streams and Floods: The Geology of Running Water

Scientists have determined that Mars has actively flowing water-filled stream channels.

Geological evidence suggests that many millions of years ago,the Amazon flowed toward the west rather than the east.

The flat-lying area surrounding a river channel is termed the ____________.

All else being equal,water will flow faster in a stream with ____________.

At a delta,____________.

If a stream cuts through flat-lying sediments to reach an anticline produced in an ancient orogenic event,the course of the stream will likely be unaffected.

In a region characterized by a parallel series of ridges and valleys,a ____________ drainage network is expected.

The inner edge of a meander,where sediment is deposited,is a(n)____________.

Meandering streams ____________.

Pirate streams ____________.

As the velocity of flow decreases,____________.

All flooding events occur so rapidly that there is no time to alert people in harm's way.

In uniform sediments with a relatively constant slope at the surface,a ____________ drainage network is expected.

The slope of a stream surface measured between two points along its course is the ____________.

A 100-year flood is more catastrophic than a 50-year flood.

The outer edge of a meander,where material is being eroded,is a(n)____________.

The distinction between a valley and a canyon is ____________.

The base level of a tributary would become ____________ if a dam and reservoir were constructed where it flowed into a trunk stream.

Which river is a threat to capture the flow of the Mississippi River through stream piracy?

The sediment load of a stream consists of only those grains that are fine enough to stay in suspension.