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 42 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?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

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.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

From space earth shows itself as a planet covered mostly by water. From space earth shows itself as a planet covered mostly by water.
Structure and function of phage T4 Structure and function of phage T4
Diverticulosis. Figure illustrates external and internal appearance of diverticula. Diverticulosis. Figure illustrates external and internal appearance of diverticula.
Structure of the trachea, which extends from the larynx above to the main bronchi below. Structure of the trachea, which extends from the larynx above to the main bronchi below.
Structure of the Early Universe Structure of the Early Universe
Providing structure and organization in the child’s environment may aid the development of ... Providing structure and organization in the child’s environment may aid the development of ...
Video: Double Stranded DNA Molecule Animation

For a complete list of videos, visit our video library