1. Early Models and Astronomers May the Force be with you
Ch 27 & 28 Astronomy
Early Models and Astronomers
Planets
May the Force be with you
Shoot for the Moon
Objects in Space
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2. Model where planets revolve around the Earth
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3. Geocentric
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4. What astronomer proposed the Geocentric model?
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5. Aristotle
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6. Who proposed the Heliocentric model?
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7. Copernicus
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8. The law that describes the path of a planet that orbits the sun is called ________
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9. Law of Ellipses
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10. What astronomer said planets moved in epicycles, which are little circles as they went around Earth?
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11. Ptolemy
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12. What is the least dense planet that also has bands and rings made of dust and ice?
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13. Saturn
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14. What is the largest planet in the solar system?
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15. Jupiter
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16. Planet who’s axis is almost parallel to its plane of orbit
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17. Uranus
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18. What planet gets its color from large amounts of methane?
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19. Uranus
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20. What 2 inner planets are most alike in their size and mass?
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21. Venus and Earth .
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22. Degree of elongation of an elliptical orbit
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23. Eccentricity
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24. The time required for a body to complete a single orbit
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25. Orbital Period
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26. Force that PULLS on a body in space
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27. Gravity
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28. When a moving body remains in a constant motion unless acted on by an outside force
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29. Inertia
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30. Pattern in which is appears as though the planets are moving backward relative to the stars
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31. Retrograde Motion
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32. The force of gravity between Earth and moon cause _____ in bodies of water
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33. Tides
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34. Dark areas on the moons surface
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35. Mare
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36. When the lighted part of the moon appears to increase, the moon is said to be __________.
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37. Waxing
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38. This occurs when the shadow of one celestial body falls on another celestial body
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39. Eclipse
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40. Name one lunar surface feature
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41. Answers may include: Mare, rilles, ridges, craters, regolith
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42. Fragments of rock that orbit the sun
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43. Asteroid
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44. Small bodies of ice, rock and dust that follows highly elliptical orbits around the sun
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45. Comets
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46. Any part of a meteoroid that didn’t burn up when entering the Earth’s atmosphere and reached Earth’s surface
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47. Meteorite
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48. Region that starts beyond Neptunes orbit which contains dwarf planets and other small bodies of ice
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49. Kuiper Belt
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50. Large cloud of dust and ice believed to hold nuclei of billions of comets and possible origin of our comets
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51. Oort Cloud
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