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

Author Question: When teaching about igneous rocks, one trick instructors often implement to help students determine ... (Read 10 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
on: Jul 16, 2018
When teaching about igneous rocks, one trick instructors often implement to help students determine the igneous composition of the samples is to use the color of the rocks as a guide.
 
  Explain how the color of an igneous rock can often be used as an indicator of its igneous composition. Be sure to reference specific minerals for each composition.
  What will be an ideal response?

Question 2

Refer to the scenario above. Assuming a temperature of 20C at the ground surface, what is the temperature at a depth of 2 miles?
 
  Scenario: In the pursuit of scientific knowledge, you decide to bore a hole into the crust to see how the temperature changes. You start your borehole in Davenport, Iowa, where the geothermal gradient is 20C/km.
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vickyvicksss

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Generally speaking, mafic rocks contain ferromagnesian minerals like pyroxene and amphibole and are therefore very dark because of the high iron and magnesium content. Felsic rocks, which contain light-colored silicate minerals such as quartz and potassium feldspar, are very light in color. Intermediate rocks, which are a combination of mafic and felsic materials, are somewhere between mafic and felsic on the color spectrum. Common intermediate minerals include plagioclase feldspar, amphibole, pyroxene, and biotite mica.

Answer to Question 2

Answer: 2 miles  1.609 = 3.2 km
3.2 km  20C/km = 64C


mspears3

  • Member
  • Posts: 586
Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

cici

  • Member
  • Posts: 325
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Teaching patient discharge instructions Teaching patient discharge instructions
Patient teaching: abdominal assessment Patient teaching: abdominal assessment
Metamorphic Rocks Metamorphic Rocks
The Impact of Cross-Ethnic Friendships on Minority Students’ Well-Being The Impact of Cross-Ethnic Friendships on Minority Students’ Well-Being
How to calculate the DRT to determine which is more effective against the pathogen How to calculate the DRT to determine which is more effective against the pathogen
Use of forward and reverse genetics to determine gene function Use of forward and reverse genetics to determine gene function
Video: Regulation of GFR: autoregulation via myogenic mechanism Myogenic mechanism

For a complete list of videos, visit our video library