Theories

Definition

Theories are well-substantiated explanations of some aspect of the natural world that are based on a body of evidence and can be used to predict future occurrences or observations. They integrate and generalize principles to provide a framework for understanding phenomena.

5 Must Know Facts For Your Next Test

1. Theories are different from hypotheses, which are testable predictions.
2. In chemistry, theories explain the behaviors and interactions of matter at atomic and molecular levels.
3. Famous examples include Dalton's Atomic Theory and the Kinetic Molecular Theory.
4. A theory must be falsifiable, meaning it can be tested and potentially proven wrong.
5. Scientific theories are subject to revision as new evidence emerges.

Review Questions

• What distinguishes a theory from a hypothesis in scientific methodology?
• Can you name an example of a theory in chemistry that explains the behavior of gases?
• Why is it important for scientific theories to be falsifiable?

Related terms

Hypothesis: A tentative explanation for an observation or phenomenon that can be tested through experimentation.

Law: A statement that describes an observable relationship in nature that appears to always be true under the same conditions.

Model: A representation or simulation used to explain or predict how phenomena occur in the natural world.