1. Standards of Measurement
International System of Units (SI)
Learning Goal: By the end of the lesson students will recognize the SI units of measurement and apply what they’ve learned with a density activity.

2. Critical Question / Self check
Why is Density a derived (created) measurement?
Critical Question / Self check
Why is Density a derived (created) unit?
Density is obtained by combining two or more units.

3. International System of Units (SI)
International System of Units (SI) – a standard system of measurement used worldwide Burma, Liberia, and the United States are the only 3 countries who have not adopted the international System of Units.

4. Have any of you measured anything before
Have any of you measured anything before? Have you ever used the SI standard? What would you measure this with?
Discussion
Hold up a round object…. They won’t know how to use a ruler to measure it, BUT you can use SI to figure it out!! woohoooo

5. Quantity Measured
Unit
Symbol
Length
Meter m
Mass
Gram g
Time
Seconds s
Temperature
Kelvin K
Amount of substance
Mole
mol
SI Base Units
When we measure liquids the standard unit we will use is Liters, but it is technically NOT an SI unit.
Quantity Measured
Not really
used
Electric Current
Ampere A
Intensity of light
Candela cd

6. Super Heroes of SI measurement
A student can’t find her phone and the SI Super Heroes are going to help her create one
Notice what every super hero is messing with; it’s a great way to remember what each unit measures

7. What we will use a lot in this class
Time-
Interval between two occurring events
Mass-
What we will use a lot in this class
Is the amount of matter or substance in an object

8. Remember… the amount of matter or substance in an object
Density
Mass per unit volume of a material d=m/v Density determines if an object floats or sinks
Is the amount of space an object takes up…

9. Waaaaaaaaaaay easier to do conversions!!
Why the SI System?
If you buy carpet, and need 100 square feet, the carpet costs $10 per square yard, how much?
How many pints are in a gallon?
How many pounds are 200 ounces?
Which drill is the larger - the 13/64, the 1/4 or the 5/32?
Which is more, 2 quarts, 5 pints or 36 fl oz?
Waaaaaaaaaaay easier to do conversions!!

10. Conversions Common SI Prefixes Prefix Symbol Kilo king Hecta henry
Deka
danced
Base (place holder)
meter, gram, liter (badly)
deci
down
centi
central
mili
main
Common SI Prefixes

12. We are going to practice
Grab a white board
We are going to practice

13. 8,000
8 meters = _____________ mm
22.1 ml = _______________ l
10,900 cm = ____________ m
m = ____________ mm
6.6 kg = _______________ g
0.0221
109
0.03
6,600

14. We are going to practice finding the density of an object.