This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Describe the plate tectonic theory. What will be an ideal ... (Read 89 times)

scienceeasy

  • Hero Member
  • *****
  • Posts: 565
on: Jul 29, 2018
Describe the plate tectonic theory.
 
  What will be an ideal response?

Question 2

Why is it that the most ancient rocks are found on the continents, and not on the ocean floor?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

asdfasdf

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: The lithosphere is broken up into about a dozen rigid moving plates that move in response to convection cycles within the planet's interior. Two types of boundaries between these platesdivergent and convergentare the sites where crust is formed (seafloor spreading) and destroyed (subduction zones). At transform boundaries, plates slide horizontally past each other.

Answer to Question 2

Answer: The ocean floors are sites of crustal formation. New crust generated at a spreading center, pushes older crust away. In general, continental crust does not get subducted because of its low density. Older oceanic crust has been subducted, while older continental crust has not.


scienceeasy

  • Hero Member
  • *****
  • Posts: 565
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


asdfasdf

  • Sr. Member
  • ****
  • Posts: 339
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Earth’s Major Tectonic Plates Earth’s Major Tectonic Plates
Contact theory indicates that prejudice decreases and relations improve when individuals of ... Contact theory indicates that prejudice decreases and relations improve when individuals of ...
Tectonic Disasters: Earthquakes Tectonic Disasters: Earthquakes
Describe how fat is digested, absorbed, and transported in the body Describe how fat is digested, absorbed, and transported in the body
International Economics: Theory and Policy (10th Edition) International Economics: Theory and Policy (10th Edition)
Sternberg's theory postulates three components of love Sternberg's theory postulates three components of love
Video: Glomerular filtrate rate: pressures that affect GFR, NFP & GFR and blood composition

For a complete list of videos, visit our video library