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a method of investigation involving observation and theory to test scientific hypotheses
data exists in categories that are ordered but differences cannot be determined or they are meaningless. (Example: 1st, 2nd, 3rd)
set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
decimal system of measurement based on certain physical standards and scaled on multiples of 10
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