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Author Question: What comprises the most abundant form of matter in the universe? A) water molecules B) planets and ... (Read 22 times)

piesebel

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on: Aug 22, 2018
What comprises the most abundant form of matter in the universe?
 A) water molecules
  B) planets and planet-like bodies
  C) dust and debris
  D) hydrogen and helium

Question 2

What are manganese nodules? How are they formed? Using the information regarding the usefulness of these nodules, can you infer why the mining of these nodules could become a political issue?


ergserg

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Reply #1 on: Aug 22, 2018
Answer to Question 1

D

Answer to Question 2

 Manganese nodules are a form of hydrogenous sediments. They contain manganese and iron oxides in addition to small amounts of cobalt, nickel, chromium, copper, and zinc.
 These nodules are formed in layers over millions of years due to a very slow chemical reaction with sea water. There is often something acting as a nucleus in the middle of these nodules. This can include shark teeth, bone fragments, and even microscopic algae and animal skeletons.
 There are materials present in manganese nodules that are used for industrial purposes. As the cost of raw materials increases, people might look to these nodules as a viable new resource of these materials.
 Think about where these nodules are found. They are not always within any one designated country's waters. The distribution of wealth from these nodules will likely only go to the countries that can afford to mine them. These factors could become political as they determine the distribution of the nodules.


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