Science

Systematic study of the natural world through observation and experimentation.

Scientific MethodBranches of ScienceObservation and Experimentation
Data Analysis and InterpretationScientific Theories and LawsEthics in Science
Everyday Problem SolvingScience and TechnologyProtecting the Environment
Asking Good QuestionsRecording and Reviewing ResultsLearning from Mistakes
Scientific MethodBranches of ScienceObservation and Expe...Data Analysis and In...Scientific Theories ...Ethics in ScienceEveryday Problem Sol...Science and Technolo...Protecting the Envir...Asking Good Question...Recording and Review...Learning from Mistak...
Advanced Topics

Scientific Theories and Laws

Explaining and Predicting the World

Scientific theories and laws help us understand how nature works.

What is a Scientific Theory?

A theory is a well-tested explanation for a wide range of observations or results. It is supported by lots of evidence, but it can change if new information is found.

What is a Scientific Law?

A law describes what always happens under certain conditions, often using math. Unlike theories, laws do not explain why things happen.

Working Together

Both theories and laws are important. Theories explain, while laws describe.

Examples

  • The theory of evolution explains how species change over time.

  • Newton’s law of gravity describes how objects attract each other.

In a Nutshell

Theories explain why things happen; laws describe what always happens in nature.

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Ethics in Science