Name: ______

Topic 9: Weathering & Erosion (pp.181 –200)

RunningWater Erosion and Streams (p.188)

What is a rill? What other term is more commonly used to describe this feature?

According to this book, what is a stream?

A small stream that flows into a larger stream is called a ______.

Streams carry sediment in three ways. Dissolved minerals are carried in ______. Solid sediments of small size – including clay-sized sediments – are carried ______in the water. Larger solid sediments are usually carried by rolling, sliding, or bouncing along the stream bottom, resulting in rounding of sediments by ______.

Rivers create V-ShapedValleys. What actions combine to create the V-shaped valley of a river?

What is a watershed? What separates one watershed from another?

Stream Velocity (p.188).

The 3 factors that control a stream’s average velocity are:

1.

2.

3.

What is a streams gradient?

What is a streams discharge?

The stream channel shape controls the amount of surface area (perimeter in figure 9-8) between the water and the ground. With more surface area between the water and the ground there is more friction or drag and turbulence slows the streams velocity.

FIGURE 9-9 IS VERY IMPORTANT! YOU MUST LEARN IT.

If a stream channel is straight, where is the fastest flowing water?

Where is the fastest flowing water when a stream channel curves?

Evolution of a Stream (p.190)

In the early stages of the stream, most of its energy is used to ______a narrow ______valley. There is usually a ______slope and many abrupt changes in elevation resulting in ______and ______.

As the stream grows larger, it begins to shift its course in a series of bends or turns called ______.

What is a Delta? Where does it form?

Glacial Erosion (p.191)

Define a glacier.

What are the two types of glaciers?

What has to happen in order for a glacier to advance?

How are glacial grooves and glacial parallel scratches (usually called STRIATIONS) formed?

Rivers and streams create V-shaped valleys. What is the shape of a glacier valley?

Figures 9-13 and 9-14 are important!

Wave and Current Erosion (p.192)

What is a long shore current (look at figure 9-16B—the zig zag motion of sand)? Why doesn’t it exist if waves strike the beach head on?

Sediment Features and Erosional Agents (p.194)

Learn figure 9-17!

Describe the sediment eroded by a stream: ______

Describe the sediment eroded by wind: ______

Describe the sediment eroded by ice: ______

Describe the sediment eroded by gravity: ______

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