Author Question: Why would decompression of the mantle cause the production of mafic magma? A) Mafic magma is ... (Read 118 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?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

For a complete list of videos, visit our video library