1. In detail and in your own words, describe the motion of each of the following objects in the solar system. Remember to write in complete sentences. Draw a sketch that shows how each object moves around the sun. You may draw your sketches by hand or you may use the Paint program on your computer. (15 points each) a. The planets (include 2 ways planets move)
b. Moons (include 2 ways moons move)
c. Comets (What is the shape of their orbit? Around what object do they orbit?)
d. Asteroids (Where do they orbit? Around what object do they orbit?)
2. In your own words, explain each of the following measures. Include estimations that compare these units of measurement to distances you are more familiar with, such as miles or kilometers. (You do not need to include a measurement for light year. Just make sure you explain in detail what a light year is.) (15 points each)
a. Astronomical Unit (AU) (Include a specific number and a unit.)
b. Light Year
c. Speed of Light (Include a specific number and unit.)
3. List the planets in our solar system in order from closest to the sun to furthest away from the sun. Make sure you have this information memorized. (15 points)
4. In your own words, name and describe the force that keeps the planets orbiting around the sun, moons orbiting around planets, etc. What TWO factors affect the strength of this force? (15 points)
5. How does distance from the sun affect a planet's orbit period? How does distance from the sun affect a planet's orbit velocity? (10 points)
6. Planets A and B are orbiting around the sun. Planet A has a longer orbit period than planet B. Which planet is closer to the sun? (10 points)
7. Planets C and D are orbiting around the sun. Planet C has a slower orbit velocity than planet D. Which planet is closer to the sun? (10 points)

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