Science, any system of ____ that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. Science can be divided into different ____ based on the subject of study. The ____ sciences study the inorganic world and comprise the fields of astronomy, physics, chemistry, and the Earth sciences. The ____ sciences such as biology and medicine study the organic world of life and its processes. ____ sciences like anthropology and economics study the social and cultural aspects of human ____

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