1. How are comets different from asteroids? Of what are comets made? And asteroids?
2. What is the difference between rotation and revolution? Why is the rotation of Venus different from that of Earth?
3. Why do Mercury and our Moon lack an atmosphere?
4. If Earth had the diameter of Jupiter, and the speed of rotation was the same, how fast would an object on the equator be traveling? Is that faster or slower than an object on the equator currently moves?
5. Jupiter is known as a gas giant planet. What are the most common gases in Jupiter’s composition?
6. Did gravity play a role in the evolution of our skeletal system? Explain your answer.
7. Identify three distinctive characteristics of the orbits of planets and moons in the solar system.
8. Briefly describe two classes of planets found in the solar system.
9. What are planetesimals, and what role do they play in the formation of planets?
10. Describe the “big splash” theory of the Moon’s origin.
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