18 Unit 2 Review
Key Terms and Concepts
Scientific Method/Process
Law
Principle
Theory
Empirical model
Physical (mechanistic) Model
SI measurement units
Unit conversion factor
Order of magnitude estimation
Scientific notation
Metric prefix
Unit 2 Learer Objectives [Corresponding Example Course Outcome #]
- Describe the scientific method through an original example of how it could be applied to the student’s everyday life. [5]
- Identify the differences and relationships between empirical models, physical models, hypotheses, theories, and laws. [5]
- Find necessary conversion factors and convert between SI and non-standard units for several physical quantities. [1]
- Perform order of magnitude estimation. [2]
a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses
a statement, usually in the form of a mathematical equation, that summarizes, but not explains, the results of repeated experiments or observations that describe some aspect of the natural, usually within a certain range of application.
principles summarize rules created and followed by scientists when formulating hypotheses, designing experiments, analyzing results.
an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method using accepted standard protocols
mathematical explanation of the relation between measured values that is used for making predictions
mechanistic explanation of how a physical system works
a system of physical units ( SI units ) based on the meter, kilogram, second, ampere, kelvin, candela, and mole
a number that relates two different units of measure for the same quantity and allows conversion between the two units
the process of approximating a value to obtain a result you expect to at least be within one order of magnitude of the correct answer.
a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.
a unit prefix that precedes a basic unit of measure to indicate a multiple or fraction of the unit
