Unit and measurement

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Across
  1. 2. Quantities with no physical dimensions
  2. 5. Expression showing base quantities
  3. 7. Complete set of base and derived units
  4. 8. Powers to which base quantities are raised
  5. 11. Physical quantity chosen as a basis
  6. 14. Indicate the precision of a measurement
  7. 15. Principle stating dimensions on both sides of an equation must be the same
  8. 18. Unit expressed as combinations of base units
  9. 19. SI base unit of length
  10. 20. Internationally accepted reference standard for measurement
Down
  1. 1. Equation equating a quantity to its dimensions
  2. 3. SI unit for plane angle
  3. 4. Study of relationships using dimensions
  4. 6. A quantity that can be measured
  5. 9. Unit used for a fundamental quantity
  6. 10. SI unit for solid angle
  7. 12. SI base unit of time
  8. 13. SI base unit of mass
  9. 16. Comparison to a certain basic standard
  10. 17. Internationally accepted system of units