1. Ch 2 Measurements and Calculations 2.1 Scientific Method
Qualitative: looks like
Qualities, descriptions, characteristics
Quantitative: numeric values
Measurements, counting

2. System: region of space selected to study/run experiment
Observations  hypothesis theory  law
Experiments
Independent variable: manipulated, “I change”
Dependent variable: responding, data collected
Constants: controls, keep conditions same
Model: visual, verbal, mathematical
Explanation of concept

3. 2.2 Units of Measurement SI SI Base Units Metric system Common units
Standard measurements
SI Base Units
m, kg, K, mol

4. SI prefixes
Scientific notation
SI derived units
Calculat ions

5. Conversion Factors

6. 2.3 Using Scientific Measurements
Accuracy: closeness to accepted/actual value
Precision: closeness of measurements to each other

7. Error in measurement Significant Figures
Skill, equipment, calculations
Significant Figures
Digits known with certainty and one rounded/estimate

8. Rounding Scientific notation: Solving problems: >5 add 1 <5 same
M x 10n
M 1-9 and n whole #
Solving problems:
Analyze
Plan
Solve
Check work

9. Directly proportional
Dividing one by other gives constant value
Not all linear plots are directly proportional
Line goes through (0,0)
Inversely proportional
Product is constant
Hyperbola
Like a see-saw (one goes up the other goes down)