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Unit 02 24-25

Changes in Matter

TermDefinition
Chemical change a change in matter that produces a new substance
Physical change change which alters the physical properties of a substance without changing its identity
Chemical properties any of a material's properties that becomes evident during, or after, a chemical reaction
Heterogeneous mixtures a mixture in which the composition is not uniform throughout the mixture.
Homogeneous mixtures a gaseous, liquid or solid mixture that has the same proportions of its components throughout a given sample.
Kinetic energy the energy of motion. As temperature increases, kinetic energy increases.
Mixture a substance made by mixing other substances together.
Photosynthesis the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
Physical properties include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point.
Precipitate cause (a substance) to be deposited in solid form from a solution.
Temperature the degree of hotness or coldness of an object
atoms the smallest unit of an element that has all the chemical properties of that element
chemical reaction a chemical change; a process that changes substances into new substances
mass the amount of matter in an object
molecule two or more atoms joined together
reactivity the tendency of two or more chemicals to react
substance the physical matter of which living or nonliving things are composed
Evidence of a chemical change unexpected Color change, Gas produced, Light produced, unexpected Temperature change, Precipitate
Created by: LMS 7 Sci
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