1. Why is it important that scientists have the same units of measurement?
What do you think would happen if scientists did not use the same measurements all over the world?
Give 3 “real world examples” where you have seen SI units (m, g, L).
Questions of the Day

2. The Metric System, Dimensional Analysis, and Significant Figures

3. Objectives Use Select and apply Make
Use a variety of notations appropriately (e.g. exponential, functional, square root).
Use
Select and apply an appropriate method (e.g., mental mathematics, paper and pencil, or technology) for computing with real numbers, and evaluate the reasonableness of results.
Select and apply
Make decisions about units, scales, and measurement tools that are appropriate for problem situations involving measurement.
Make
Use concepts of length, area, and volume to estimate and solve real-world problems.
Objectives

4. Kelvin – K (temperature)
Basic Units combine with prefixes to make a final amount
Metric System
Basic SI Units
Meter – m (length)
Gram – g (mass)
Liter – L (volume)
Kelvin – K (temperature)
Common Prefixes
Micro – u 1/
Milli – m 1/1000
Centi – c 1/100
Kilo – k 1000

6. SI Units 1 kg = kilo (1000) gram = 1000 grams
1 mm = milli (1/1000) meter = 1/1000 of a meter
1 uL = micro (1/ ) liter = 1/ of a liter
1 gram = 1/1000 kilogram = kg
1 meter = 1000 millimeters = 1000 mm
1 liter = microliters = uL

8. SI Units

15. Quick Check! Convert each to the unit in parentheses
257 g (kg)
22 mm (cm)
354 dL (L)
5 L (mL)
13 kg (cg)
King Henry Doesn’t Usually Drink Chocolate Milk
k – h – da – UNIT – d – c – m

16. SI Derived Units

17. Questions of the Day Convert 52.7 g to dg Convert 733 mm to km
Give 3 examples of derived units.
Write out the conversion ladder. (KHDUDCM)
Questions of the Day

19. Objectives Use Select and apply Make
Use a variety of notations appropriately (e.g. exponential, functional, square root).
Use
Select and apply an appropriate method (e.g., mental mathematics, paper and pencil, or technology) for computing with real numbers, and evaluate the reasonableness of results.
Select and apply
Make decisions about units, scales, and measurement tools that are appropriate for problem situations involving measurement.
Make
Use concepts of length, area, and volume to estimate and solve real-world problems.
Objectives

20. Dimensional Analysis (Important for BIG conversions)

21. King Henry Doesn’t Usually Drink Chocolate Milk
k – h – da – UNIT – d – c – m

22. Dimensional Analysis (Important for BIG conversions)
Converting 10 m/s to km/hr

23. Significant Figures