Author Question: Do you think there is a water table beneath the sea? Beneath lakes? What will be an ideal ... (Read 28 times)

Bob-Dole

  • Hero Member
  • *****
  • Posts: 547
Do you think there is a water table beneath the sea? Beneath lakes?
 
  What will be an ideal response?

Question 2

Describe how glaciers erode rock and carry sediment.
 
  What will be an ideal response?



Ptupou85

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

Sediments on the ocean floor are saturated with water. Beneath lakes, it is possible to have an unsaturated zone, and a saturated zone below that.

Answer to Question 2

Shear stress increases with the increasing weight of the glacier, so a thick glacier exerts great shear stress on the bed and also on valley walls. This shear stress allows the moving ice to pluck rock and to abrade the rock because of fragments frozen into the ice. Water flowing beneath a glacier alternately freezes and thaws, which further dislodges rock fragments that may then freeze into the base of the glacier where they are carried along and may contribute to further rock abrasion. Water under the glacier commonly flows at high pressure, which enhances erosion potential and permits the water to carry eroded debris out from beneath the glacier.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

For a complete list of videos, visit our video library