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Chemistry the study of substances and elements as they combine to form new substances Matter anything that takes up space and has mass Space has volume, is 3-dimensional, fits stuff within Mass the amount of atoms contained Element different kinds of atom Atom greek derivative, cannot be divided any further Atom contains subatomic particles (protons, neutrons, electrons) Qualitative description that uses words Quantitative uses numbers to describe Accuracy hitting the true value Precision hitting the same value over and over again Biochemistry chemistry of living organisms Organic Chemistry uses carbon with few others such as chonps Chonps carbon, hydrogen, oxygen, nitrogen, phosphorous, sulfur Inorganic Chemistry chemistry of all elements, including carbon. Usually based on quantitative measures Analytical breakdown of the parts in a chemical Percent Error amount of error in an experiment Experiment a test for a statement Hypothesis a statement which can be tested Science asks questions, you must be able to test repeatedly Theory a hypothesis that has been tested several times, accepted to be a good prediction Law a theory that has been tested a lot of times