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

Author Question: How do we know Earth's internal structure? ... (Read 44 times)

DyllonKazuo

  • Hero Member
  • *****
  • Posts: 565
on: Aug 7, 2018
How do we know Earth's internal structure?

Question 2

Explain how oceanic crust is created and destroyed.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mjbamaung

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Aug 7, 2018
Answer to Question 1

Seismic waves from earthquakes that pass through Earth's interior before being recorded by seismographs are used to reconstruct Earth's internal structure. Seismic waves are refracted or reflected at major density changes or phase changes. For example, S waves cannot pass through liquids, and this tells us that Earth's outer core is molten.

Answer to Question 2

Oceanic crust forms from volcanism at midoceanic ridges (powered by melt from the mantle) before moving away like a conveyor belt. Where that plate reaches a subduction zone, it dives down into the mantle, where it will eventually melt.


DyllonKazuo

  • Hero Member
  • *****
  • Posts: 565
Reply #2 on: Aug 7, 2018
TY


mjbamaung

  • Sr. Member
  • ****
  • Posts: 343
Reply #3 on: Aug 7, 2018
You're welcome


« previous next »
 

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

The functional structure of the peripheral nervous system. (A) Afferent or sensory neurons carry sen The functional structure of the peripheral nervous system. (A) Afferent or sensory neurons carry sen
teach their children to care for the earth in hopes of passing on a better world to future generatio teach their children to care for the earth in hopes of passing on a better world to future generatio
Structure of the Early Universe Structure of the Early Universe
Vienna: Social Structure and Social Interaction Vienna: Social Structure and Social Interaction
Cellulose structure Cellulose structure
The chemical structure of the water molecule facilitates life The chemical structure of the water molecule facilitates life
Video: Dissociative Disorders (Part 1)

For a complete list of videos, visit our video library