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A theory is a unifying statement that explains a body of facts and the laws based on that body of facts. <ref>Bishop, M. (2012). Chapter 1 The nature of chemistry. Retrieved November 25, 2012 from http://www.mpcfaculty.net/mark_bishop/Bishop_1_1A_eBook.pdf. </ref> According to Bogen, "Theories are customarily represented as collections of sentences, propositions, statements or beliefs, etc., and their logical consequences. <ref>Bogen, J. (2009). Theory and observation in science. Stanford Encyclopedia of Philosophy. Retrieved November 25, 2012 from http://plato.stanford.edu/entries/science-theory-observation.</ref>"

Theory Testing

Theories may be rejected with the development of new instruments or experimental procedures.CITATION REQUIRED Theories are never proven. A scientific theory summarizes a hypothesis or group of hypotheses that have been supported with repeated testing. A theory is valid as long as there is no evidence to dispute it. Therefore, theories can be disproven. Basically, if evidence accumulates to support a hypothesis, then the hypothesis can become accepted as a good explanation of a phenomenon. One definition of a theory is to say it's an accepted hypothesis. <ref about.com> Helmenstine, anne marie (2009) Scientific theory http://chemistry.about.com/od/chemistry101/a/lawtheory.htm</ref>

  1. Atomic Theory
  2. Kinetic Molecular Theory
  3. Quantum Mechanical Theory
  4. Acid - Base Theory

A theory is a framework or model in which observations are explained and predictions are made.

  1. Well tested explanations
  2. Refined or discarded when new experimental results conflict
  3. Three aspects to a theory: philosophical, mathematical, and empirical.

A good theory:

  • Explains current data
  • is as simple as possible
  • predicts results of future experiments
  • suggests new lines of research


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