Isaac Newton

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Across
  1. 5. The speed of something in a given direction.
  2. 6. Born before the end of the full term of gestation.
  3. 7. The phenomenon in which an object changes its position.
Down
  1. 1. A person who invented a particular process or device or who invents things as an occupation.
  2. 2. Someone who has no friends or company.
  3. 3. Someone who studies or teaches mathematics.
  4. 4. Italian natural philosopher, astronomer, and mathematician.