Tuesday, March 29, 2011

Vocab words week 2

  1. phase
  2. eclipse
  3. solar eclipse
  4. umbra
  5. penumbra
  6. lunar eclipse
  7. tide
  8. gravity
  9. geocentric
  10. heliocentric
  11. ellipse
  12. inertia
  13. terrestrial planet
  14. retrograde rotation
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