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 73 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?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

magnesium magnesium
Bioarchaeologists and forensic anthropologists use archaeological excavation techniques to recover r Bioarchaeologists and forensic anthropologists use archaeological excavation techniques to recover r
A spark plug thread chaser is a low-cost tool that hopefully will not be used often, but is ... A spark plug thread chaser is a low-cost tool that hopefully will not be used often, but is ...
Cost Accounting 14 Cost Accounting 14
Marine Life Zones "الحياة في أعماق البحار" Marine Life Zones "الحياة في أعماق البحار"
Wave-Cut Platform and Marine Terrace Wave-Cut Platform and Marine Terrace
Video: Metaphase I Animation

For a complete list of videos, visit our video library