1. WARM UP Convert the following units: 1m = 100 cm 340cm = 3.4 m 100
24km = 24,000 m
Express this one in scientific notation:
5mm = ___________ km
100
3.4
24,000
5.0 x 10-6

2. Objectives Monday August 26, 2013 I can:
Use the ladder method to convert my metric units.
Differentiate between accuracy and precision.

3. Metric Conversions Ladder Method

4. How many jumps does it take?
Ladder Method 1 2 3
KILO 1000 Units
HECTO 100 Units
DEKA 10 Units
DECI 0.1 Unit
Meters Liters Grams
CENTI 0.01 Unit
MILLI Unit
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.
4 km = _________ m
Starting Point
Ending Point
How many jumps does it take? 4. 1
__. 2
__. 3
__.
= 4000 m

5. Conversion Practice Try these conversions using the ladder method.
1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm
14 km = _______ m 109 g = _______ kg 250 m = _______ km
Compare using <, >, or =.
56 cm m 7 g mg

6. Metric Conversion Challenge
Write the correct abbreviation for each metric unit.
1) Kilogram _____ 4) Milliliter _____ 7) Kilometer _____
2) Meter _____ 5) Millimeter _____ 8) Centimeter _____
3) Gram _____ 6) Liter _____ 9) Milligram _____
Try these conversions, using the ladder method.
10) 2000 mg = _______ g 15) 5 L = _______ mL 20) 16 cm = _______ mm
11) 104 km = _______ m 16) 198 g = _______ kg 21) 2500 m = _______ km
12) 480 cm = _____ m 17) 75 mL = _____ L 22) 65 g = _____ mg
13) 5.6 kg = _____ g 18) 50 cm = _____ m 23) 6.3 cm = _____ mm
14) 8 mm = _____ cm 19) 5.6 m = _____ cm 24) 120 mg = _____ g

7. Compare using <, >, or =.
25) 63 cm m 27) 5 g mg 29) 1,500 mL L
26) 536 cm dm 28) 43 mg g 30) 3.6 m cm

8. Why it matters & How We Determine Accuracy & Precision
Accuracy and Precision
Why it matters & How We Determine Accuracy & Precision

9. By selecting the “right” piece of equipment you will reduce error by measurement in your experimental results
The “right” equipment depends on the quantity you are measuring and the amount of uncertainty associated with that equipment.
2 factors should be taken into account when collecting data...

10. Accuracy
Draw Me!
Accuracy is how close the measurement is to the true or actual value
If you are asked to measure a particular value you want to measure as closely as possible to that quantity

11. Precision
Draw Me!
Precision is the exactness and reproducibility of the measurement
The same quantity measured the same way will (should) produce values that closely agree with each other

12. Good Scientists Want Both!
In order to collect the best data that we can we want to be both precise and accurate!
Draw Me!

13. Sample Size & Multiple Trials
Performing multiple trials and using a large sample size will reduce the amount of random error associated with your measurements.
By looking at your data, you can tell if your methods are precise (repeatable) if your trials all agree with each other
By decreasing the amount of random error, you are getting closer to the actual value (hopefully!)

14. FRONT OF ROOM WHAT IS YOUR COLOR? DOORE3 F2 D3 E2 F1 D2 D1 E1 E4 F4 F3
WHAT IS YOUR COLOR? C1 B2 A3
Before 1st Transition - Small Group Outlining of 1st selected reading. Short discussion before transition of content and vocabulary words. C4 B1 A2 C3 C2 B4 B3 A1 A4
BACK OF ROOM

15. MOVE TO YOUR COLOR GROUP
FRONT OF ROOM
DOOR
MOVE TO YOUR COLOR GROUP
Before 1st Transition - Small Group Outlining of 1st selected reading. Short discussion before transition of content and vocabulary words.
BACK OF ROOM

16. MOVE TO YOUR COLOR GROUP
FRONT OF ROOM
DOOR
Mass Of Objects
Length of Objects
Count Your Drops
Before 1st Transition - Small Group Outlining of 1st selected reading. Short discussion before transition of content and vocabulary words.
Questions
Volume of Solid Objects
MOVE TO YOUR COLOR GROUP
BACK OF ROOM