2. Definitions must explain observations simply and clearly
Scientific theory
explanation that has been tested by repeated observations
must explain observations simply and clearly
experiments that illustrate the theory must be repeatable
Must be able to predict from the theory

3. Scientific Law
states a repeated observation about nature
Scientific model
Representation of an object or event that can
be studied to understand the real object or event
Examples of models:
can be mental picture or set of rules
Drawings on paper
Computer models
3 dimensional models

4. Examples of Models

5. Steps of the scientific method
Make an OBSERVATION
Formulate a question
Do research
Form a Hypothesis
Test the Hypothesis
Analyze results
Draw conclusions
Share with others

6. DEMONSTRATION QUESTIONS
WHAT ARE THE TWO LIQUIDS IN THE BEAKERS?
WHAT WOULD BE A HYPOTHESIS FOR THIS EXPERIMENT?
HOW CAN WE TEST OUR HYPOTHESIS?
WHAT CONCLUSION CAN BE DRAWN FROM THIS DEMONSTATION?

7. Units of Measurement SI units base units Length Meter M Mass KilogramKg
Time
Second S
Temperature
Kelvin K
Electric current
Ampere A
Amount of
Substance
Mole
Mol
Luminous intensity
Candela cd

8. SI PREFIXES Giga G Billion 1000 000 000 Mega M Million 1000 000 Kilo K
Thousand
1000
hecto h
hundred
100
deca da
tens 10
Base unit 1
Deci d
Tenth
0.1
Centi c
Hundredth
0.01
Milli m
Thousandth
0.001
Micro ,
Millionth
Nano N
Billionth
pico p
trillionth

9. KING………………….KILO
HENRY………………..HECTO
DIED…………………DEKA
MONDAY……………base unit DRINKING…………….DECI
CHOCOLATE…………CENTI
mILK……………….MILLI

10. PRACTICE CONVERSIONS 113 g to milligrams 700 micrometers to nanometers
49,890 m to centimeters
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11. A. Biology
B. physical science
C. Earth science
D. botany
E. zoology
F. ecology
G. physics
H. chemistry
I. geology
J. meteorology