1. Natural science is called "three fields of science" together with "social science" and "thinking science". It is the general name of all kinds of sciences that study inorganic nature and organic nature, including human biological properties, by quantitative means. Natural science is a science that studies organic or inorganic things and phenomena in nature, including astronomy, physics, chemistry, earth science and biology.
2. The two most important pillars of natural science are observation and logical reasoning. By observing nature and logical reasoning, natural science can guide the laws in nature. If the observed phenomenon is different from the prediction of the law, it is either because the observation is wrong or because the law that has been considered to be correct so far is wrong, and supernatural factors are not considered.
According to the traditional usage, natural science can be understood as: physical science, chemical science (involving the physical and chemical laws of this universe), biological science (involving the unique nature of life) and space science. The floorboard of earth science.
4. Natural science is a science that studies the material form, structure, nature and movement law of nature. It includes basic science of physics, chemistry, biology, astronomy, earth science and applied science of medicine, agronomy, meteorology and materials science. It is a summary of the practical experience of human beings in transforming nature, that is, the experience of production struggle. Its development depends on the development of production.