Author Question: Why would decompression of the mantle cause the production of mafic magma? A) Mafic magma is ... (Read 129 times)

nramada

  • Hero Member
  • *****
  • Posts: 580
Why would decompression of the mantle cause the production of mafic magma?
 
  A) Mafic magma is produced at high pressures.
  B) With less pressure comes higher melting points.
  C) Mafic magma is produced at low pressure.
  D) With less pressure comes lower melting points.

Question 2

Volcanoes are present at convergent plate boundaries because
 
  A) the plates rub together, causing friction and heat.
  B) water is carried down with the subducting plate and causes the mantle to melt.
  C) heat from the inner mantle travels up along the subducting plate.
  D) decompression melting due to decreased pressure at the boundary causes the mantle to melt and rise into volcano formations.



nixon_s

  • Sr. Member
  • ****
  • Posts: 359
Answer to Question 1

Answer: D

Answer to Question 2

Answer: B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

For a complete list of videos, visit our video library