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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