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Quiz Chap. 16 Vocabulary Name_______________________________ Date______________ Class________________ Heliocentric Geocentric Chromosphere moon core star ellipse Kepler Earth Mercury Galileo sunspots Photosphere solar system terrestrial In a _ Geocentric _ system, Earth is at the center of the revolving planets and stars. 2. In a __ Heliocentric system, Earth and the other planets revolve around the sun. 3. _ Mercury ___ is the smallest and closest to the Sun of the eight planets in the Solar System, with a revolution of about 88 Earth days. 4. _ solar system __consists of the sun, the planets and their moons, and several kinds of smaller objects that revolve around the sun. 5. The four closest planets to the sun: Mercury, Venus Earth and Mars that are rocky, metal and have few moons are called ___ terrestrial _____planets. 6. __ Kepler __ is an astronomer who found that the orbit of each planet is an ellipse. 7. A ___ moon ___is a natural satellite that revolves around a planet. 8. An elongated shape that is more oval than circular is an/a ___ ellipse ___. 9. _ Galileo ___ is an astronomer who used a telescope to make discoveries that supported the heliocentric model. 10. The __ core __ is deep inside the sun where an enormous amount of energy is produced. 11. The ____ Photosphere ___is the inner layer of the suns atmosphere that is visible. 12. __ sunspots ____ are areas of gas on the sun’s surface that are cooler than the areas around them. 13. The sun is a huge ball of glowing gas that heats our planet but is also considered to be a medium sized ___star______. 14. Which planet has the ability to sustain life? ______Earth_____ 1. Bonus: A. My revolution is 365 days, which planet am I? __Earth___ B. My color is red because of iron oxide in my soil, which planet am I? __Mars____ C. I am the hot during the day and cold at night because I do not have an atmosphere, which planet am I? __Venus_________