Briefly describe how planetary scientists believe the Earth's Moon was created. How does this provide a clue that can explain why the planet Venus spins in the opposite direction to all other planets?
Q4: Describe the technique of radiometric dating. Be sure to explain what we mean by a radioactive (parent) isotope and a daughter isotope, and what is the meaning of a half-life. What is the age of the Earth based on this method?
Q5: Describe the surface and atmosphere (if there is one) of each of the five terrestrial worlds in our solar system: 1-Mercury, 2-Venus, 3-Earth, 4-Earth's Moon, and 5-Mars. Comment on whether life might be possible on each world based on these conditions.
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