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Vocab Chapter 4

Physical Change a change from one state (solid or liquid or gas) to another without a change in chemical composition
Chemical Change a change that occurs when one or more substances change into entirely new substances with different properties
Mixture (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)
Substance that which has mass and occupies space
Physical Property a characteristic that can be observed or measured without changing the identity of the substance
Chemical Property a property used to characterize materials in reactions that change their identity
Density Mass/volume the amount of matter in a given space
Boiling Point the temperature at which a liquid boils at sea level
Melting Point the temperature at which a substance changes from a solid to a liquid
Solubility the ability of one substance to dissolve in another at a given temperature and pressure
Law of Conservation of Matter states that matter is neither created nor destroyed, only changed in form
Law of Conservation of Energy the law that states that energy cannot be created or destroyed but can be changed from one form to another
Endothermic describes a process in which heat is absorbed from the environment
Reactivity the ability of a substance to combine chemically with another substance
Combustibility the ability to burn
Exothermic chemical reaction in which energy is primarily given off in the form of heat
Created by: 841745