Author Question: Our Earth has many resources, but they are not unlimited. In the case of abundant metals, supply ... (Read 26 times)

Jipu 123

  • Hero Member
  • *****
  • Posts: 569
Our Earth has many resources, but they are not unlimited. In the case of abundant metals, supply will most often meet demand. However, problems can occur when
 
  A) there is a shortage of ores that can be mined at a reasonable cost.
  B) high grade ores are depleted and low-grade ores need to be mined.
  C) transport and processing costs override economic feasibility.
  D) all of the above.

Question 2

The melting point of silicate minerals is strongly dependent on the amount of silica it contains. The first minerals to melt are those with
 
  What will be an ideal response?



miss_1456@hotmail.com

  • Sr. Member
  • ****
  • Posts: 289
Answer to Question 1

Answer: D

Answer to Question 2

A) lowest melting point and lowest silica content.
B) lowest melting point and highest silica content.
C) lowest silica content and highest melting point.
D) highest silica content and highest melting point.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

For a complete list of videos, visit our video library