« previous next »

Author Question: The most violent volcanic explosions are generated from A) basaltic lava flows. B) andesitic ... (Read 74 times)

dmcintosh

  • Hero Member
  • *****
  • Posts: 517
on: Jul 29, 2018
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
Reply #1 on: Jul 29, 2018
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
« previous next »
 

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?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Major reservoirs and flows of the hydrological cycle. Major reservoirs and flows of the hydrological cycle.
The spectrum generated (b) is a family of peaks, with each successive peak The spectrum generated (b) is a family of peaks, with each successive peak
The argon-argon method is useful for dating volcanic sediments. The argon-argon method is useful for dating volcanic sediments.
Air flows through the PCV valve during acceleration and when the engine is under a heavy load. Air flows through the PCV valve during acceleration and when the engine is under a heavy load.
Shiprock, New Mexico – a volcanic neck Shiprock, New Mexico – a volcanic neck
In the Florida lottery, the numbers (between 1 and 49) are generated randomly with the ... In the Florida lottery, the numbers (between 1 and 49) are generated randomly with the ...
Video: B cells and antibodies

For a complete list of videos, visit our video library