What Is An Atom And How Do We Know?

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Across
  1. 1. the Greek thinker who first proposed the idea of atoms
  2. 4. the chart that lists all 118 elements
  3. 6. a tool used to see very small things normal ones can’t see atoms
  4. 8. physicist who proposed an experiment confirming atoms exist
  5. 12. anything that has mass and takes up space made of atoms
  6. 14. microscope that allowed scientists to feel and see atoms
Down
  1. 2. a scientific test done to learn something or confirm a theory
  2. 3. English schoolteacher who found mathematical evidence for atoms
  3. 5. an element that combines with oxygen to form water
  4. 7. the meaning of the Greek word atomos
  5. 9. a substance made when two or more elements react to form something new
  6. 10. an element that combines with hydrogen to make water or with iron to make rust
  7. 11. when elements combine or separate to form new substances
  8. 13. a pure substance that cannot be broken down into simpler substances
  9. 15. the fundamental building block of chemistry