Author Question: The most violent volcanic explosions are generated from A) basaltic lava flows. B) andesitic ... (Read 90 times)

dmcintosh

  • Hero Member
  • *****
  • Posts: 517
The most violent volcanic explosions are generated from
 
  A) basaltic lava flows.
  B) andesitic lava flows.
  C) granitic lava flows.
  D) ocean floor lava flows.

Question 2

What does partial melting have to do with silica content of a magma?
 
  What will be an ideal response?



diana chang

  • Sr. Member
  • ****
  • Posts: 288
Answer to Question 1

Answer: B

Answer to Question 2

Answer: Partial melting produces magmas with a higher silica content than the parent rock because the high silica content minerals are the first to melt and the lower silica content minerals are left unmelted.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

For a complete list of videos, visit our video library