Astronomy Unit 2 Term Review

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Across
  1. 2. how long it takes to complete a revolution
  2. 4. dust particles released from comet, curves
  3. 7. small fused grains of interstellar dust
  4. 8. comets coming from the Oort cloud
  5. 9. accumulation of matter through collisions
  6. 11. when ice turns directly to gas
  7. 14. serves as condensation nuclei in space
  8. 16. hot condensed ball of gas/dust @ nebula center
  9. 17. a symmetrical oval
  10. 18. name for a protostar that achieves nuclear fusion
  11. 20. gas particles released from comet, straight kuiperbelt region of frozen bodies @ solar system edge
  12. 21. space rock
  13. 22. when a space rock enters atmosphere and glows meteorshower when Earth passes through comet debris meteorite a space rock that lands on Earth's surface solarnebula a cloud of dust/gas that forms solar system
Down
  1. 1. Explanation of solar system formation
  2. 3. formed from condensed planetesimals
  3. 5. leftover material at edges of solar system
  4. 6. theoretical region around entire solar system
  5. 7. Halo of sublimated gas around a comet
  6. 10. frozen bodies of gas+dust
  7. 12. ring of planetesimals between Mars/Jupiter
  8. 13. anything that orbits another body shortperiodcomets comets coming from the Kuiper belt
  9. 15. attractive force between masses
  10. 19. formed from condensed chondrules