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Chemical Change

(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

Chemical Property

a property used to characterize materials in reactions that change their identity

Chemical Reaction

(chemistry) a process in which one or more substances are changed into others

Chemical Symbol

A one or two letter representation of an element


an enclosure of residences and other building (especially in the Orient)


the process of purifying a liquid by boiling it and condensing its vapors


an abstract part of something

Extensive Property

a property that depends on the amount of matter in a sample


the process whereby fluids pass through a filter or a filtering medium


a pedal that controls the throttle valve

Heterogeneous Mixture

a mixture in which different materials can be distinguished easily

Homogeneous Mixture

a mixture in which substances are evenly distributed throughout the mixture

law of conservation of mass

Is any physical change or chemical reaction, mass is conserved; Mass can be neither created nor destroy.


a substance in the fluid state of matter having no fixed shape but a fixed volume


(often followed by 'of') a large number or amount or extent


(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)


(astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun)

Physical Change

a change from one state (solid or liquid or gas) to another without a change in chemical composition

Physical Property

A characteristic of a pure substance that can be observed without changing it into another substance


done with very great haste and without due deliberation


a chemical substance formed as a result of a chemical reaction


a chemical substance that is present at the start of a chemical reaction


of definite shape and volume


a homogeneous mixture of two or more substances


the choicest or most essential or most vital part of some idea or experience


Describes the gaseous state of a substance that is generally a liquid or solid at room temperature


physical objects consisting of a number of pages bound together

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