Science is a systematic venture that constructs and coordinates knowledge in the form of predictions and testable predictions about the physical world. It encompasses a range of systematic approaches to science which include observational science, descriptive science, quantitative science, structural science, environmental science and cosmological science. The concepts in science are mathematically rigorous and are derived from observations of the natural world. There is a growing interlinkage between sciences and other disciplines, and there are growing interlinkages between naturalistic sciences and engineering sciences and vice versa. There are numerous examples of theories in science that have been successfully tested and have been proven true, though there are also many theories in science that remain subject to ongoing research.

One of the most important ideas in science is the scientific method. This is an explanation of how various types of scientific inquiry can be conducted and analyzed. In this method, a hypothesis is stated, with accompanying evidence, to test whether or not that hypothesis is true. If the hypothesis is found to be false, the scientist then has an opportunity to try again, or to accept his or her original conclusion and modify it accordingly.

Another significant idea in science is the principle of universal or fundamental uniformity. This concept states that there is no such thing as separate reality, only a common underlying structure that exists in all observation, which can be seen in the natural world. The natural world includes everything that scientists observe, including matter, energy, space, time, gravity, atomic composition, matter-energy pairs, virtual reality, time, and consciousness.