Units and measurements

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Across
  1. 3. A name of a derived unit that describes a amount of force used.
  2. 5. Time is a physical quantity, second is a ... of time.
  3. 9. A simple ruler has an uncertainty of 1 ... .
  4. 10. A prefix that means 1 000 000 000 of something.
  5. 11. Each side of the table was measured with an uncertainty of 1 mm. How many mm will the uncertainty of the perimeter be?
  6. 12. A Greek symbol used to describe an uncertainty in Science.
  7. 14. What is the unit of electric current?
  8. 17. What physical quantity can be measured with a dynamometer?
  9. 18. A base unit of length.
  10. 19. One of the base units, unit of light luminosity.
  11. 20. One of the base units, that describes the amount of matter.
  12. 21. 0.000001 s is the same as 1 ... second. What is the missing prefix?
Down
  1. 1. A second is a base unit, a Joule is a ... unit.
  2. 2. Translate the word 'suwmiarka' into English.
  3. 4. Metric prefix that expresses a 1000 of something.
  4. 6. Metric prefix that expresses a 1 000 000 of something.
  5. 7. A unit created from the base unit of length and a prefix that means 'a thousand of something'.
  6. 8. In what country was the metric system created?
  7. 13. One of the countries that does not recognise the SI system.
  8. 15. A prefix that means 100 of something.
  9. 16. A scale we have been using during classes has an uncertainty of 1 ... .
  10. 18. A physical quantity expressed in kg.