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

Author Question: Why are ores so valuable? A) They are sources of naturally occurring gold. B) Metals can be ... (Read 32 times)

B

  • Hero Member
  • *****
  • Posts: 570
on: Jul 29, 2018
Why are ores so valuable?
 
  A) They are sources of naturally occurring gold.
  B) Metals can be efficiently extracted from them.
  C) They tend to occur in scenic mountainous regions.
  D) They hold many clues to Earth's natural history.

Question 2

Given that the total number of atoms on our planet remains fairly constant, how is it ever possible to deplete a natural resource such as a metal?
 
  A) The problem remains that not everyone recycles as they should.
  B) Recycling only forestalls the inevitable depletion of metal resources.
  C) The atoms don't leave our planet, which is why naturally occurring materials never really reach the point of depletion.
  D) The problem is with the expense of collecting metal atoms that are uniformly dispersed.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

stanleka1

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: D


B

  • Member
  • Posts: 570
Reply 2 on: Jul 29, 2018
Wow, this really help

bulacsom

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Model for the events occurring around a single replication fork Model for the events occurring around a single replication fork
Molten gold beetle Molten gold beetle
Point Sources of Pollution Point Sources of Pollution
Selected Minerals: Food Sources, Functions, and Deficiency and Toxicity Symptoms Selected Minerals: Food Sources, Functions, and Deficiency and Toxicity Symptoms
Interventions for Selected Co-Occurring Conditions Interventions for Selected Co-Occurring Conditions
Same pair of homologs, but with an exchange occurring between two nonsister chromatids Same pair of homologs, but with an exchange occurring between two nonsister chromatids
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library