Structure and properties of matter vocabulary

Term Definition
Thermal energy The kinetic energy of the moving particles in a substance or an object.
Solid Firm and stable in shape.
Liquid having a consistency like that of water
Gas an airl ike fluid substance which expands freely to fill any space available, irrespective of its quantity.
Plasma A state of matter made up of charged atoms,uncharged atoms,and free electrons
Colloid A mixture that contains particles that are to small to see.
Phase Change The states in which matter can exist: as a solid, liquid, or gas. When temperature changes, matter can undergo a phase change, shifting from one form to another.
Particle A minute portion of matter.
Melting Point The temperature at which a substance changes from a solid to a liquid.
Freezing point The temperature at which a liquid turns into a solid when cooled.
Boiling Point The temperature at which a substance changes from a liquid to a gas.
Evaporation The process by which a liquid changes into a gas.
Condesation The process by which water vapor changes into liquid water.
Volume The amount of space something takes up.
Mass The amount of matter something has.
Density The degree of compactness of a substance.
Pure Substance A material that is composed of only one type of particle
Atom The basic unit of a chemical element.
Molecule a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
Element each of more than one hundred substances that cannot be chemically inter-converted or broken down into simpler substances and are primary constituents of matter.
Compound a thing that is composed of two or more separate elements; a mixture
Extended Structure made larger the arrangement of and relations between the parts or elements of something complex.
Physical Change A physical change is a change in which no new substances are formed.
Chemical Change a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties
Natural Resource materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.
Synthetic Material Synthetic fabrics are textiles made from man-made rather than natural fibers.

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