1. Measurement Notes

2. Measurement: compare an unknown value with a known value using standard units
We use the metric system so we can communicate internationally

3. Precision Degree of exactness. Same result over and over again
The smaller the units on a tool the greater the precision

4. Low accuracy
Low precision
High precision
High accuracy

5. Measuring
The more decimal places you have in an answer the more precise the instrument is
Ruler: length (cm) 2 decimal places
Beaker: volume (mL): whole #
100mL graduated cylinder: 1 decimal
10mL graduated cylinder: 2 decimal

6. Conversion practice 1000mg= ________g 2. 14kg = ________g
3. 160cm= ________mm

7. How many jumps does it take?
Ladder Method 1 2 3
KILO Units
HECTO Units
DEKA 10 Units
DECI Unit
Meters Liters Grams
CENTI 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