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hypothesis a tentative explanation or prediction based on experimental observations
quantitative numerical data, such as the temperature at which a chemical substance melts, or mass
qualitative nonnumerical observations, such as the color of a substance, or physical appearance
law a concise verbal or mathematical statement of a behavior or a relation that seems always to be the same under the same conditions
T/F: Mass is always conserved in chemical reactions. True
theory a well-tested, unifying principle that explains a body of facts and the laws based on them. It is capable of suggesting new hypothesis that can be tested experimentally. It is based on carefully determined and reproducible evidence.
T/F: Theories can and do change as new facts are uncovered. True
Created by: maryas