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

Author Question: What marine resource has been rendered uneconomical due to the cost of excavation? a. Magnesium ... (Read 70 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
on: Aug 22, 2018

What marine resource has been rendered uneconomical due to the cost of excavation?
  a. Magnesium compounds
  b. Manganese nodules
  c. Sand and gravel
  d. Salt



Question 2

Why does oil seep to the surface from its source rock?
  a. Capillary actions
  b. Convection
  c. Oil is less dense than surrounding sediments
  d. Porosity is higher at the surface



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

pami445

  • Sr. Member
  • ****
  • Posts: 303
Reply #1 on: Aug 22, 2018
Answer to Question 1

ANS: B
There are different ways of mining manganese nodules. Unfortunately, none of the methods people
have come up with have made it cost effective to mine these nodules. There may come a point in time
when the mining of these nodules becomes economical. Information can be found in the section
Physical Resources.



Answer to Question 2

ANS: C
Oil migrates to the surface through porous overlaying formations. It does this because it has a lower
density than the sediments around it. Information can be found in the section Physical Resources.



olgavictoria

  • Hero Member
  • *****
  • Posts: 528
Reply #2 on: Aug 22, 2018
TY


pami445

  • Sr. Member
  • ****
  • Posts: 303
Reply #3 on: Aug 22, 2018
You're welcome


« previous next »
 

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Sources and Amounts of Oil Released into North American Marine Waters Sources and Amounts of Oil Released into North American Marine Waters
Marine West Coast (Cfb, Cfc) Marine West Coast (Cfb, Cfc)
Guardian Figures at Gate A of the Citadel Of Sargon II During Its Excavation in the 1840s Guardian Figures at Gate A of the Citadel Of Sargon II During Its Excavation in the 1840s
Glacial deposits overlain by marine carbonates formed in very warm water Glacial deposits overlain by marine carbonates formed in very warm water
Cost = $99.49; Rate of markup based on cost = 32%. Find the markup and selling price. Cost = $99.49; Rate of markup based on cost = 32%. Find the markup and selling price.
Fluid–solute balance in freshwater and marine bony fishes Fluid–solute balance in freshwater and marine bony fishes
Video: Carbohydrate digestion (brush border enzymes, end products) & Carb absorption (fructose, galactose)

For a complete list of videos, visit our video library