PHSC 210 WEEK 5 Mastering Geology Assignments

PHSC 210 WEEK 5 Mastering Geology Assignments 8 

Mastering Geology Assignments 8

 Item 1

 Part A

Which of the following is the primary step that allows water to enter the groundwater system?

Part B

Which of the following statements about the global water supply is true?

Part C - Ranking water sources

 Rank the following sources of water from largest to smallest in terms of percentage of the world’s total supply.

Rank from largest to smallest. To rank items as equivalent, overlap them.

 Item 2

Stream drainage patterns develop in response to variability in the material over which the streams are flowing and by following the path of least resistance. As they flow downslope due to gravity, a number of factors can influence where streams will establish their channels.

 Some of these factors present variability in resistance to erosion caused by differences in rock type, degree of fracturing, and/or underlying geologic structures. Stream drainage patterns can often provide clues about the geology underlying the landscape.

Drainage patterns:

·         Dendritic drainage patterns resemble a branching tree. Dendritic patterns are the most common type of stream drainage, and typically form where streams flow over materials that are uniform in their resistance to erosion.

·         Radial drainage patterns develop where streams radiate outward from an isolated high area.

·         Rectangular drainage patterns can form where streams flow over rocks that are heavily fractured. Since fractures (joints) often run nearly perpendicular to each other, stream channels in a rectangular drainage pattern join each other at right angles as they follow the fractured, more easily eroded bedrock.

·         Trellis drainage patterns form where streams flow over alternating bands of harder and softer ground (for example, flowing over folded layers of alternating resistant and less resistant rock). This pattern of erodible and less erodible ground leads to channels that run nearly parallel to one another, connected in breaks in ridgelines. These have the appearance of a garden trellis.

Part A - Classifying stream drainage patterns

Drag the appropriate labels to their respective targets.

Part B - The origin of the stream drainage patterns

Item 3

Part A

Which of the following rivers is the largest river in North America?

Part B

Which of the following choices does not directly affect stream velocity?

Part C

The amount of meandering that occurs in a stream influences the gradient in which of the following ways?

Part D

 What type of drainage pattern would you expect to find developing on rocks that have been folded and exposed by differential erosion over time?

 PHSC 210 WEEK 5 Mastering Geology Assignments | Assignment Help | Liberty University 

Part E

While working on a stream in your field study area, you find that the channel width is 20 meters, the channel depth is 2 meters, and the velocity is 1.2 meters/second. What is the discharge of this stream?

Item 4

 Streams reshape the landscape through erosion and deposition of continental earth. Erosion removes earth, which creates stream channels and stream valleys. Deposition, on the other hand, allows sediment to accumulate in an area. The force of flowing stream water determines whether erosion or deposition will occur at a particular location along a stream. In order for a stream to move sediment, the force of stream water flow must be greater than the frictional forces holding the sediment grains in place. Recall that

force = mass × acceleration

Thus, we would expect erosion to occur where stream water has high acceleration and deposition to occur where stream water has low (even negative) acceleration.

Part A - Erosion and deposition along a meandering stream

 Part B - Base level and stream valleys

 Part C - Stream features

A river system can be divided into three zones: a zone of erosion, a zone of transportation, and a zone of deposition, as shown in the figure below.

Determine the zone where each of the depicted features occurs.

Drag the appropriate items into their respective bins. Each item may be used only once.

Item 5

Part A

Which of the following zones is the location of the most biological activity?

Part B

In terms of freshwater storage, groundwater is second only to which of the following sources?

Part C

The majority of groundwater is stored within which of the following zones?

Part D

During a summer with little rainfall, your house on a hill slope experiences an interval during which your well runs dry. You have to borrow water from your neighbour who lives down slope from you. Why does your neighbour have water when you don’t?