1. Agenda Bell Work
• Safety Quiz • Review for Safety Quiz
• Notes: Systems of
Measurement
• Modern Marvels:
Measurement

2. What is Missing?
 Brad’s shoe is 28
 The caterpillar we observed was 4 long
 Karen ran 50
 Steven’s little sister is 1 old.
 Allison’s plant grew 11 tall.
 The scientist used a piece of wire 30 long
to connect the device to her equipment

3. Units of Measurements
Units Type of Measurement

4. Systems of
Measurement
February 5, 2013

5. Objectives
1. Define a Standard of Measurement
2. Name the prefixes for the SI units
3. Identify units of time, mass, volume,
density, temperature, and length

6. Standards of Measurement
 A reference point against which other
things can be evaluated
 Handful of cheerios?

7. Standards of Measurement

8. SI Units
 Based on the metric Quantity Unit Symbol
system
Length Meter m
Mass Kilogram kg
Time Second s
Force Newton N
Energy Joule J
Current Ampere A
Temperature Kelvin K

9. Other Units
 Volume = L x W x H
cm3 or mL
m3 or L
 Density = Mass/Volume
g/cm3
kg/m3

10. Prefixes
Prefix Symbol Definition
kilo- k thousand
hecto- h Hundred
deka- da ten
deci- d tenth
centi- c hundredth
milli- m thousandth

11. Metric System
 MetricSystem is based on Units and
prefixes
 Prefix + Unit = Metric Measurement
 Centi + Meter = Centimeter
 Kilo + Liter = Kiloliter

12.  So
if you needed to measure length you
would choose meter as your base unit
 Length of a tree branch
• 1.5 meters

Length of a room
• 5 meters

Length of a ball of twine stretched out
• 25 meters

13. Examples
1 Kilogram = 1000 grams
4 Kilograms = 4000 grams
1 Centimeter = .001 meter
100 Centimeter = 1 meter
2000 milliliters = 1 liter
5 liters = .005 kiloliters