Crossword Unit 4 : EUREKA !

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Across
  1. 3. the verb of the noun "innovation"
  2. 5. is "Penicillin" an invention or a discovery ?
  3. 6. what do we call " the answer to a problem" ?
Down
  1. 1. is " the washing machine" a discovery or invention?
  2. 2. a word means without a cable.
  3. 4. someone who has invented something.