science stuff

Term Definition
thermal energy thermal energy:the kinetic energy of the moving particles in a substance or object
solid Solid is one of the four fundamental states of matter (the others being liquid, gas, and plasma). It is characterized by structural rigidity and resistance to changes of shape or volume.
liquid A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.
gas an air like fluid substance which expands freely to fill any space available, irrespective of its quantity.
Plasma the colorless fluid part of blood, lymph, or milk, in which corpuscles or fat globules are suspended.
Colloid a homogeneous, noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance.
Phase change Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition. Substances on Earth can exist in one of four phases, but mostly, they exist in one of three: solid, liquid or gas.
Particle a minute portion of matter.
Melting point the temperature at which a given solid will melt.
Freezing point the temperature at which a liquid turns into a solid when cooled.
Boiling point the temperature at which a liquid boils and turns to vapor.
Evaporation Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance.
Condensation water that collects as droplets on a cold surface when humid air is in contact with it.
Volume the amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.
Mass In physics, mass is a property of a physical body. It is generally a measure of an object's resistance to changing its state of motion when a force is applied.
Density the degree of compactness of a substance.
Pure substance A material that is composed of only one type of particle; examples of a pure substance include gold, oxygen and water. Mixture. A material made up of at least two different pure substances. Mechanical Mixture.
Atom he 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 interconverted 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 extended family definition. A type of family in which relatives in addition to parents and children (such as grandparents, aunts, uncles, and cousins) live in a single household. A nuclear family forms the core of an extended family.
Physical change Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
Chemical change Chemical change is any change that results in the formation of new chemical substances. At the molecular level, chemical change involves making or breaking of bonds between atoms. These changes are chemical: iron rusting (iron oxide forms)
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. Examples of synthetic fabrics include polyester, acrylic, nylon, rayon, acetate, spandex, lastex,orlon and Kevlar.

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