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Matter and Energy 2

Unit 1 Matter and Energy Part 2

TermDefinition
Pure Substances A material that is composed of only one type of particle, whether it be an atom or molecule.
Physical Change A change from one state (solid, liquid, gas, or plasma) to another without a change in chemical composition.
Chemical Change A process where chemical bonds are broken and new bonds are formed between different atoms.
Conservation of Energy A principle stating that energy cannot be created nor destroyed, but can be altered from one form to another.
Conservation of Matter A fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system, but can only change form.
Heat Flow The amount of heat transferred.
Reactivity The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.
Conbustibility A measure of how easily a substance will set on fire.
Precipitate To cause (a substance) to be deposited in solid form from a solution.
Potential Energy The energy of a particle or system of particles derived from position, or condition, rather than motion. (stored energy)
Kinetic Energy The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed. (energy in motion)
Chemical Reaction Interaction of two or more chemicals that produces one or more new chemical compounds, or alters the properties of the original substances.
Heat The form of energy that flows between two samples of matter due to their difference in temperature.
Substances A particular kind of matter with uniform properties.
Homogeneous Uniform in structure or composition throughout.
Heterogeneous Consisting of dissimilar elements or parts; not homogeneous.
Created by: lcrowe