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 71 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?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

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

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Blue whale skeleton, outside the Long Marine Laboratory at the University of California, Santa Cruz Blue whale skeleton, outside the Long Marine Laboratory at the University of California, Santa Cruz
magnesium magnesium
Marine and coastal ecosystems Marine and coastal ecosystems
Strawberries contain iron, copper, magnesium, phosphorus, vitamin B6, vitamin K and vitamin E Strawberries contain iron, copper, magnesium, phosphorus, vitamin B6, vitamin K and vitamin E
Cost of Laptops Cost of Laptops
Wave-Cut Platform and Marine Terrace Wave-Cut Platform and Marine Terrace
Video: A Human Karyotype Preparation Animation

For a complete list of videos, visit our video library