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Unit 4 5 vocabulary terms to define: Vocabulary Term heliocentric Definition Geocentric ellipse Orbital period Astronomical unit 4 key questions to answer: 1. Name 4 ways that the gas giants are different than the terrestrial planets. 2. What is the difference between a meteor, a meteorite, and a meteoroid? 3. Explain the formation of the moon according to the Giant Impact Theory. 4. Name and describe Kepler’s 3 Laws of Planetary Motion. 3 diagrams 1. Draw a picture of a heliocentric and geocentric model of our solar system 2. Draw and label a picture of a comet. Include: the sun, nucleus, coma and tails. 3. Draw a map of our solar system. Include: the Sun, the 8 planets, asteroid belt, Oort Cloud and Kuiper belt. 2 multiple choice questions 1. The picture below shows a planet in its orbit around the Sun. At which point would the planet be moving the SLOWEST? A. A B. B C. C 2. a. b. c. d. Asteroids are Pockets of gas in the solar system Satellites of planets Planets orbiting stars other than the Sun Irregular shaped, terrestrial bodies 1 True/False Question (correct and explain if False) The shape of Earth’s orbit is highly elliptical.