CJ's Astronomy Study Guide Test 3 - (112 Briefly explain the concept of sources and sinks in the Carbon cycle Give at least two examples of sources and

CJ's Astronomy Study Guide Test 3 - (112 Briefly explain...

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(112) Briefly explain the concept of sources and sinks in the Carbon cycle. Give at least two examples of sources and two examples of sinks. (113) What is the ozone layer, and why is it important for life on Earth? Explain how the production of Chloroflourocarbons (CFC's) results in the partial destruction of Earth's ozone layer. (114) Read the EPA's web page about ozone at to answer the following question: Briefly explain two reasons (one having to do with wind patterns and one having to do with ice clouds) why the ozone depletion largely occurs over the Antarctic each year rather than uniformly in the rest of the Earth's atmosphere. (TQ) (115) How do we know that water has been present on the Earth since shortly after its formation? (TQ) (116) Briefly explain two possible ways early Earth's water could've been "lost" and not become a permanent part of Earth's oceans. (TQ) (117) Explain the evidence from recently-observed comets (such as Halley) that implies most of Earth's water probably did not come from comets. (TQ) (118) What is the Faint Sun paradox and how has it been "resolved" by our atmosphere? (we covered this in lecture as well) (TQ)

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