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 10 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?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

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

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

The domain structure of a STAT protein The domain structure of a STAT protein
Structure of a DNA strand Structure of a DNA strand
(A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph (A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph
Structure of the water molecule Structure of the water molecule
Structure of the nucleosome core particle as revealed by X-ray diffraction Structure of the nucleosome core particle as revealed by X-ray diffraction
Structure of E. coli 30S pre-rRNA Structure of E. coli 30S pre-rRNA
Video: HIV replication/ Replication cycle of HIV

For a complete list of videos, visit our video library