The Nebular Theory Crossword

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Across
  1. 3. Giant ______ theory is the theory that a large object struck earth breaking off a piece of earth's mantle which became the moon
  2. 4. Jovian planets are made of mostly this
  3. 8. A ______ collapsed into a flat disk
  4. 10. The process of how the planets formed
Down
  1. 1. _______ theory is the theory that our moon was a piece of earth that disconnected when earth was molten
  2. 2. According to nebular theory, after the nebula collapsed the nebula proceeded to ____
  3. 5. The ___ formed in the center of this spinning nebula
  4. 6. _______ theory is the theory that our moon was floating in space until it was captured by earth's gravitational
  5. 7. The solar system was formed 4.6 _______ years ago
  6. 9. All the planets orbit in the ____ plane and direction