Ale’s unit 5 crossword extension

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Across
  1. 3. something or somebody who has no mass
  2. 5. a specific goal or achievement
  3. 6. something very simple
  4. 7. the transport that flies
  5. 8. a mathematic guess
Down
  1. 1. a order you are given
  2. 2. a transmission of energy through space
  3. 4. somebody you don’t know
  4. 5. what do you do on Christmas and Easter and birthdays?