Chem Vocab.
Published on Nov 26, 2015
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PRESENTATION OUTLINE
Chemistry- Chemistry is a branch of physical science that studies the composition, structure, properties and change of matter.
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Matter- anything that has both mass and volume (occupies space).
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Mass- a coherent, typically large body of matter with no definite shape.
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Weight- a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
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Scientific method- noun
a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
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Observation- the action or process of observing something or someone carefully or in order to gain information.
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Quantitative data- information about quantities; that is, information that can be measured and written down with numbers.
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Qualitative data- Data that approximates or characterizes but does not measure the attributes, characteristics, properties. Qualitative data describes whereas quantitative data defines.
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Hypothesis- a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
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Experiment- a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
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Independent variable (MIX)-
a variable (often denoted by x ) whose variation does not depend on that of another.
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Dependent variable (DRY)- a variable (often denoted by y ) whose value depends on that of another.
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Control variable- something that is constant and unchanged in an experiment. Further, a control variable strongly influences values; it is held constant to test the relative impact of independent variables.
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Conclusion- a judgment or decision reached by reasoning.
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Model- a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.
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Theory- a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
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scientific law- a statement based on repeated experimental observations that describes some aspect of the universe. A scientific law always applies under the same conditions, and implies that there is a causal relationship involving its elements.
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Pure research- a systematic study directed toward greater knowledge or understanding of the fundamental aspects of phenomena.
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Applied research- a form of systematic inquiry involving the practical application of science. It accesses and uses some part of the research communities' accumulated theories, knowledge, methods, and techniques, for a specific, often state-, business-, or client-driven purpose.
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