1. 1.2 Scientific Method

2. Scientific Method Form a question
Research the question & make observations
Form a hypothesis
Experiment to test the hypothesis
Analyze data
Conclusions
Hypothesis is supported
Hypothesis is not supported (revise hypothesis and repeat method)

3. Experiment Vocabulary:
Control- the standard that the results of the experiment are compared to
Independent variable- the variable the scientist changes
Dependent variable- responds to changes in the independent variable
Variables- anything that changes during the course of the experiment
Constants- anything that remains the same throughout the experiment
Qualitative data- descriptive data (pictures, observations)
Quantitative data- measurements involving numbers

4. Metrics Measurement Base Unit Length Meter (m) Mass Kilogram (Kg) Time
Second (s)
Quantity
Mole (mol)
Temperature
Kelvin (K)
Electric Current
Ampere
Luminous Intensity
Candela

5. Prefix
Abbreviation
Value
Giga- G
1 × 109
Mega- M
1 × 106
Kilo- k
1 × 103 -- 1
Centi- c
1 × 10-2
Milli- m
1 × 10-3
Micro- μ
1 × 10-6
Nano- n
1 × 10-9
Pico- p
1 × 10-12
Femto- f
1 × 10-15

6. Dimensional Analysis Process for converting between units.
The Unit Equality (1 km = 1000 m) becomes the Conversion Factor:
1000m
1km
1km
1000m or
Multiply the starting unit by the conversion factor.
Example: Convert 4.6 m to km
1 km
1000 m
4.6 m x
= km
Note: do not use conversion factors in determining the number of significant digits.

7. Practice:
56 m = ______ km
9.32 mg = ______ g
4.1 L = ______ mL
76.89 m = ______ inches (2.54 cm = 1 inch)
Convert 29 seconds into years. (52 weeks = 1 year)

8. Practice:
56 m = ______ km
9.32 mg = ______ g
4.1 L = ______ mL
76.89 m = ______ inches
Convert 29 seconds into years.
3027 in
9.2 x 10-7 years

9. Derived Units Two or more base units combined to make a new unit
Volume = (length x width x height) = cm3
Density = (Mass per volume) = g/ mL