« previous next »

Author Question: Contrast the physical characteristics of the asthenosphere and the lithosphere. What will be an ... (Read 70 times)

xroflmao

  • Hero Member
  • *****
  • Posts: 515
on: Jul 14, 2018
Contrast the physical characteristics of the asthenosphere and the lithosphere.
 
  What will be an ideal response?

Question 2

Chinook winds, land-sea breezes and Santa Ana winds are examples of ________ circulations.
 
  A) synoptic B) macroscale C) vortex D) microscale E) mesoscale


alvinum

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 14, 2018
Answer to Question 1

The top portion of the upper mantle is part of the stiff lithosphere, and beneath that is the weaker asthenosphere. The lithosphere consists of the entire crust and uppermost mantle and forms Earth's relatively cool, rigid outer shell. It averages approximately 100 kilometers in thickness, but the lithosphere is more than 250 kilometers thick below the oldest portions of the continents. Beneath this stiff layer to a depth of about 350 kilometers lies the soft, comparatively weak asthenosphere. The top portion of the asthenosphere has a temperature/pressure regime that results in a small amount of melting. Within this very weak zone, the asthenosphere and lithosphere are mechanically detached from each other. The result is that the lithosphere is able to move independently of the asthenosphere.

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Hormones and secondary sex characteristics Hormones and secondary sex characteristics
Abnormal physical assessment findings Abnormal physical assessment findings
Common Physical and Mental Health Problems of Different Cultural Groups Common Physical and Mental Health Problems of Different Cultural Groups
Contrast of ventilation and external and internal respiration. Contrast of ventilation and external and internal respiration.
Weather Characteristics of North American Air Masses Weather Characteristics of North American Air Masses
The relationship between recombination frequency and physical distance between genes The relationship between recombination frequency and physical distance between genes
Video: Phases of mitosis

For a complete list of videos, visit our video library