Invention

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Across
  1. 2. Object that has been created. Starts with an "M"
  2. 3. Invention which we have in our kitchens and heats up our food
  3. 4. the man who came up with a very famous theory
Down
  1. 1. the woman who invented Mother's Day
  2. 2. Object that we have in the laboratory and is used to observe tiny things