rockon 12 - Points Awarded 15.0 0 Points Missed 0.00...

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Points Awarded 15.0 0 Points Missed 0.00 Percentage 100% 1. What happens to most living things, after they die? A) They are recycled, usually by being “burned” with oxygen to provide energy for other living things, or to provide energy to fires. B) They are recycled, usually by being “burned” with Diet Pepsi to provide energy for other living things, or to provide energy to fires. C) They are fossilized. D) They are buried in regions with much oxygen, and turned into fossil fuel. E) They are buried in regions with little oxygen, and turned into fossil fuel. Feedback: Nature is a very efficient recycler, so almost everything that lives is recycled. The recycling is usually achieved through slow “fires” in other living things (including you!), using oxygen. However, sometimes a “real” fire such as a forest fire will do the job. Table for Individual Question Feedback Points Earned: 1.0/1.0 Correct Answer(s): A 2. If you were looking for different types of coal, you likely would find: A) Lignite in the metamorphic rocks of eastern Pennsylvania, and anthracite in the sedimentary rocks of western Pennsylvania. B) Lignite in the metamorphic rocks of eastern Pennsylvania, and more lignite in the sedimentary rocks of western Pennsylvania. C) Bituminous in the metamorphic rocks of eastern Pennsylvania, and lignite in the sedimentary rocks of western Pennsylvania. D) No coal in Pennsylvania. E) Bituminous in the sedimentary rocks of western Pennsylvania, and anthracite in the metamorphic rocks of eastern Pennsylvania. Feedback: Bituminous is found with sedimentary rocks, but ones that have been squeezed and
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heated a bit so they are far from being loose sediment; such rocks are common in western Pennsylvania. Anthracite is the most-cooked coal, and is found with metamorphic rocks in eastern Pennsylvania. Pennsylvania has lots of coal, but not much lignite, which would not be found in metamorphic rocks anyway. Table for Individual Question Feedback Points Earned: 1.0/1.0 Correct Answer(s): E 3. If we could artificially double the CO 2 content of the atmosphere and then hold the CO 2 content at that level for a thousand years, the most likely effect would be: A) The Earth would cool until a new ice age occurred. B) The Earth would cool a little, and then the temperature would stabilize at that new, cooler level. C) Nothing would happen to the Earth’s temperature. D) The Earth would warm a few degrees, and then the temperature would stabilize at that new, warmer level. E) The Earth would warm many tens of degrees. Feedback: Doubling CO 2 is estimated to warm the Earth by between 1.5 and 4.5 o C, or 2.7 to 8.1 o F, with some chance of slightly larger change and very little chance of smaller change. The physical basis of warming from CO 2 is quite well understood, and cooling or no response is very unlikely.
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