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.
Water striders serve as a model organism for the study of sexual conflict between males and females.
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A thimble of water contains 4.0 x 1021 molecules. The number of moles of H2O is:
For Transport, Put the Amputated Part in a Dry, Sealed Bag and Place It in Cool Water That Contains