Words using un- and -tion

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Across
  1. 4. when something happens but you cannot think about it
  2. 6. when aliens take over the planet
  3. 8. (clipped) multiply
  4. 9. when your mom is biased and is
  5. 10. when you have a child it is the next __________
  6. 11. (clipped) divide
Down
  1. 1. when you are walking you are in ______
  2. 2. the name of the event of cars smashing each other
  3. 3. what you say when a pigeon poops on your head
  4. 5. (clipped) add
  5. 7. (clipped) subtract