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

Author Question: Which explanation best describes how oceanic crust is formed? A) Continental crust is swallowed ... (Read 61 times)

abc

  • Hero Member
  • *****
  • Posts: 543
on: Jul 16, 2018
Which explanation best describes how oceanic crust is formed?
 
  A) Continental crust is swallowed by the sea at subduction zones.
  B) Oceanic crust is extracted from the mantle by partial melting and crystallization.
  C) Oceanic crust crystallizes in the core and is pushed up through volcanic pipes.
  D) Oceanic crust formed when magma ocean cooled and has remained unchanged except around plate boundaries and at hot spots.

Question 2

The oceanic crust has an average age of ________ and a maximum age of ________.
 
  A) 200 million; 400 million
  B) 80 million; 200 million
  C) 100 million; 180 million
  D) 90 million; 300 million


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ergserg

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: C


abc

  • Member
  • Posts: 543
Reply 2 on: Jul 16, 2018
Wow, this really help

upturnedfurball

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Mendel's Explanation of Inheritance Mendel's Explanation of Inheritance
In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con
The rapid collapse of the South Vietnamese army in 1975 caught many by surprise. Evacuees formed a ... The rapid collapse of the South Vietnamese army in 1975 caught many by surprise. Evacuees formed a ...
The formed elements: In this image, the red cells are red, the white cells are white, and the ... The formed elements: In this image, the red cells are red, the white cells are white, and the ...
Creating a Continental Economy Creating a Continental Economy
Effects of Continental Drift Effects of Continental Drift
Video: Inflammatory response Animation

For a complete list of videos, visit our video library