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Chemistry

Unit One Vocabulary

QuestionAnswer
Chemical Change A change that produces matter with a different composition than the original matter.
Chemical Property A substance’s ability to react with other substances.
Chemistry The study of the composition of matter and the changes that matter undergoes
Compound Matter containing two or more different types of atoms combined in a fixed proportion.
Element Matter containing only one type of atom.
Heterogeneous Mixtures A mixture that is not uniform in composition; components are not evenly distributed throughout the mixture.
Homogeneous Mixtures A mixture that is uniform in composition; components are evenly distributed throughout the mixture.
Hypothesis A proposed explanation for an observation.
Inference a conclusion that is developed through evidence, reasoning, or past observations.
Law of Conservation of Mass In any physical change or chemical reaction, mass is conserved neither created nor destroyed.
Matter Anything that has mass and occupies space.
Observation something noticed or perceived through your senses, such as: seeing, hearing, or touching something directly.
Physical Change A change that does not involve changing the identity of the substance.
Physical Property A quality or condition of a substance that can be observed or measured without changing the substance’s composition.
Precipitate A solid that forms and settles out of a liquid mixture.
Pure Substance aka Substance Matter that has a uniform and definite composition, either an element or a compound.
Qualitative Data Data that is descriptive in nature, expressed in terms of language rather than numerical values.
Quantitative Data - any information that can be quantified, counted, or measured, and given a numerical value.
Variable- any factor, trait, or condition that can exist in differing amounts and that could influence the result of an experiment
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