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"Earth and physical sciences, including astronomy, chemistry, geography, geographic information systems, geology, and physics are disciplines classified as natural sciences. They generally involve nonliving materials and the principles of fundamental relationships and laws in the universe.”
--from the description of the Chemistry Department in the San Diego City College 2019-2020 Catalog (pdf).
The picture is a molecular model of an alanine peptide.
This image is a derivative work of MM_PEF.svg, created by Edboas and licensed with Cc-by-sa-3.0, GFDL