When it comes to scientific terms, people often get confused between scientific laws and scientific theories. Although both terms seem similar, they have different meanings and implications in the world of science. In this article, we will discuss the differences between scientific laws and scientific theories.

What is a Scientific Law?

A scientific law is a statement that describes a natural phenomenon that has been observed to occur consistently. It is a concise and precise statement that explains how something behaves under specific conditions. Scientific laws are based on empirical evidence gathered through repeated experiments and observations.

Unlike scientific theories, which attempt to provide an explanation for why something occurs, scientific laws only describe what happens. For example, the law of gravity states that any two objects in the universe are attracted to each other with a force that is proportional to their masses and inversely proportional to the square of the distance between them.

Examples of Scientific Laws:

What is a Scientific Theory?

A scientific theory is an explanation that attempts to provide an understanding of why something occurs. It is a well-tested idea or set of ideas that explain various phenomena based on empirical evidence, observations, and experimentation.

Unlike scientific laws, which describe what happens, theories attempt to provide an explanation for how or why it happens. For example, the theory of evolution attempts to explain how living organisms have evolved over time through natural selection.

Examples of Scientific Theories:

Difference Between Scientific Laws and Theories:

The main difference between scientific laws and theories is that laws describe what happens, whereas theories attempt to explain how or why it happens. Laws are concise statements that are based on empirical evidence, whereas theories are well-tested explanations that are based on observations, experimentation, and evidence.

Another difference is that scientific laws can be used to make predictions about future events, while scientific theories cannot make predictions with the same level of accuracy. For example, the law of gravity can be used to predict the trajectory of a projectile, but the theory of evolution cannot predict the exact course of evolution for any given species.


In conclusion, scientific laws and scientific theories are both important concepts in science. While laws describe what happens in nature under specific conditions, theories attempt to provide an explanation for why it happens. Both concepts are essential in advancing our understanding of the natural world and have contributed greatly to technological advancements and improvements in our daily lives.