physical science

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Across
  1. 3. atoms move fast and randomly
  2. 5. smallest part of an element
  3. 9. orbits the nucleus of an atom
  4. 10. uses grams and measures weight
Down
  1. 1. educated guess
  2. 2. What is the SI unit of energy?
  3. 4. Which is the main gas that makes up the Earth's atmosphere?
  4. 6. What is the aggregate of all forces exerted on an object called?
  5. 7. What is the SI unit of force?
  6. 8. the amount of space something takes up