Units and measurements

3. A name of a derived unit that describes a amount of force used.
5. Time is a physical quantity, second is a ... of time.
9. A simple ruler has an uncertainty of 1 ... .
10. A prefix that means 1 000 000 000 of something.
11. Each side of the table was measured with an uncertainty of 1 mm. How many mm will the uncertainty of the perimeter be?
12. A Greek symbol used to describe an uncertainty in Science.
14. What is the unit of electric current?
17. What physical quantity can be measured with a dynamometer?
18. A base unit of length.
19. One of the base units, unit of light luminosity.
20. One of the base units, that describes the amount of matter.
21. 0.000001 s is the same as 1 ... second. What is the missing prefix?

1. A second is a base unit, a Joule is a ... unit.
2. Translate the word 'suwmiarka' into English.
4. Metric prefix that expresses a 1000 of something.
6. Metric prefix that expresses a 1 000 000 of something.
7. A unit created from the base unit of length and a prefix that means 'a thousand of something'.
8. In what country was the metric system created?
13. One of the countries that does not recognise the SI system.
15. A prefix that means 100 of something.
16. A scale we have been using during classes has an uncertainty of 1 ... .
18. A physical quantity expressed in kg.