Name:__________________________________________________ Period: _____________

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Incredible Measurements*

The metric system or SI (system international) provides a universal standard if measurement. It is a decimal system scaled on the powers of 10. Pick up a metric ruler and look carefully at the scale. You will see many little lines and every so often a much longer line marked with a number. The longer lines are centimeters (cm) and the shorter lines are one tenth of a centimeter (0.1) or a millimeter (mm).

1. Using your metric ruler, draw a line that is 7 cm long. Put a small mark on the line for each cm length.

2. Draw a line that is 7 mm long.

3. What do you notice about the relationship between the lengths of these lines?

4. What part of a cm is one mm?

To measure lengths that do not fall exactly on a centimeter mark, either count all of the small lines to record the measurement in mm or use cm and count the small lines as tenths of a cm.

5. Measure the length of the following line.

____________________________

Length = ____________________mm and length = ____________________cm

6. Measure the length of the following line.

_________________________________________________

Length = ____________________mm and length = ____________________cm

To measure volume in a graduated cylinder works much the same way as a metric ruler. The longer lines are milliliters (mL) and the shorter lines are one tenth of a milliliter (0.1). If the volume does not fall exactly on a milliliter (mL) mark, you should count the small lines as tenths of a mL.

7. _________mL 8. _________mL 9. _______mL 10. ___________mL

Make the following conversions in within the metric system or SI.

11. 3.0 m = ______cm 16. 0.25 km = _____m

12. 1,500 mL = _____L 17. 50,000 hm = _____m

13. 35 cg = _____g 18. 0.015 g = _____mg

14. 0.05 m = _____mm 19. 75 dL = _____L

15. 2.5 L = _____mL 20. 2,750 mg = _____g

21. The metric system is easy to use because it is based on units of ____________________.

22. The basic unit of length in the metric system is the _____________________________.

23. Which unit of length would you use to measure a giraffe? ________________________.

24. Which unit of length would you use to measure a Redwood tree? ______________ญญญ_____.

25. Which unit of length would you use to measure a bacterium? ______________________.

26.
What does the prefix *kilo-*mean?
____________________________________________.

27.
What does the prefix *deci-* mean?
___________________________________________.

28.
What does the prefix *milli-* mean?
___________________________________________.

29. The basic unit of volume in the metric system is the ___________________________ for liquids and ______________________________________________________ for solids.

30.
334.6 mL = __________________________________ cm^{3}.

31. The basic unit of mass in the metric system is the _______________________________.

32. What unit of mass would you use to measure the mass of an elephant? ______________.

33. What unit of mass would you use to measure the mass of an adult human? ___________.

34. What unit of mass would you use to measure the mass of an mouse? ________________.

35. The basic unit of temperature in the metric system is the __________________________.