1. Measurement
Big Idea:  Scientists world wide use SI measurements, prefixes indicate larger or smaller numbers and conversion factors.

2. Measurement
Some discoveries in science happened by pure luck, but most discoveries came through careful planning.
The scientific method is a logical approach to solving problems and collecting data, formulating and testing hypotheses, and formulating theories that are supported by data

3. Measurements
Observations include making measurements and collecting data.  Which is done in two ways.
The data may be qualitative (descriptive).  An example is the color of copper metal.
The data may be quantitative (numerical).  An example is the copper metal has a mass of g.

4. Measurement Could you use the following recipe to make a muffins?
Combine muffin mix, 1/3 milk, 1 vegetable oil and 1 egg.
What would you need to know?
A quantity is something that has magnitude, size, or amount.
A quantity is not the same as a measurement.

5. Measurement
What is the metric system (SI system)?

6. Measurement Scientists world wide use SI measurement
Scientists all over the world have agreed on a single measurement system called Le Systeme international d’Unites or SI.
It has 7 base units and prefixes are used to represent quantities that are larger or smaller than the base units.

7. Measurement
YOU WILL NEED TO KNOW THESE FIVE BASE SI UNITS FOR CHEMISTRY.
Quantity
Quantity Symbol
Unit name
Unit abbreviation
length l
meter m
mass
kilogram/gram
kg/g
time t
second s
temperature T
kelvin K
amount of substance n
mole
mol

8. Measurement Conversion factors
Express a mass of g in milligrams and kilograms.

9. Measurement
You could use the following to help in converting one unit to another.
103
102
101
100
10-1
10-2
10-3
kilo
hecto
deka
Base Unit
deci
centi
milli
king
harry
drools
ugly
dark
chocolate
milk
Do examples on the board

10. Formative Assessment
Label each of the following measurements by the quantity each represents.
5.0 g/ml
37 s
39.56 g
25.3 cm3
30.23 ml
2.7 mg