Please explain to the class the questions below in your own words:
(You do not have to explain multiple choice questions, just select one option).
1) In essence, the nebular theory holds that our solar system formed from the collapse of an interstellar cloud of gas and dust.
True or False?
2) Which of the following statements about Mars is not true?
A) We have landed spacecraft on its surface.
B) It is frozen today, but once had flowing water.
C) We could survive on Mars without spacesuits, as long as we brought oxygen in scuba tanks.
D) It is considered part of our inner solar system.
3) Earth has been gradually warming over the past few decades. Based on a great deal of evidence, scientists believe that this warming is caused by human activities that are increasing the concentration of greenhouse gases in Earth’s atmosphere.
How can we stop global warming? Explain.
4) Based on all we know about the terrestrial worlds, what single factor appears to play the most important role in a terrestrial planet’s geological destiny?
A) its size
B) its distance from the Sun
C) whether or not it has liquid water
D) its composition
Grading Criteria:
1) Directly and completely post the requested information. (60 points)
2) Respond to another student’s post explaining the reason for your agreement or disagreement or why you think the post is important. (20 points)
3) Respond to two or more posts explaining the reason for your agreement or disagreement or why you think the post is important. (20 points)
Total Possible (100 points)
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