Albert Einstein Crossword Puzzle

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Across
  1. 4. Became a citizen of what country in 1936.
  2. 8. He invented a type of this common household item.
  3. 9. What does 'E' mean in his famous formula?
  4. 10. He won the 1921 Nobel Prize in what field of science?
Down
  1. 1. His discoveries made it possible to make the ... bomb.
  2. 2. He was famous for the theory of...
  3. 3. Time Magazine (1999) named him person of the..
  4. 5. Country he was born in.
  5. 6. His favourite instrument.
  6. 7. His oldest sons name.