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8th Unit 1b terms

Matter & Energy Key Terms

TermDefinition
Electron Cloud The part of an atom that contains all of the orbiting electrons
Element The simplest type of substance made up of only one type of atom.
Orbit To revolve around something, such as electrons revolving around the nucleus
Matter Anything that has mass and takes up space
Neutral charge Neither a positive nor a negative charge
Nucleus The central part of an atom that contains the protons and neutrons
Compound A Substance made up of two or more different types of atoms
Model A structure built to represent something else for the purpose of study
Mixture A physical combination of two or more substances
Pure Substance A substance made up of all the same type of atom or all the same type of molecule
Molecule Two or more atoms bonded together
Property A characteristic of something
Chemical Property A property that describes the potential to undergo some kind of chemical change
Physical Property A property that can be observed without chemically altering a substance
Chemical Energy The energy contained in the chemical bonds of a substance.
Conduction Direct movement of energy from one molecule to the next
Convection cell Circular movements of fluids due to changes in density caused by changes in temperature.
Convection The movement of fluids due to differences in density created by uneven heating
Electrical Energy A form of energy that is produced by the flow of electric charge through a conductor.
Electromagnetic Radiation Energy produced by the motion of electrically charged particles. This form of energy can travel through empty space as well as any other substance
Energy The ability to do work
Kinetic Energy Energy of motion that is in the process of doing work.
Potential Energy Stored energy that has the potential to do work.
Radiant Energy Energy derived from the emission of radiation. Example: energy from the sun
Temperature The measurement of the amount of thermal energy that an object contains.
Thermal Energy The amount of energy that an object contains due to the kinetic energy within its atoms or molecules.
Electron Negative particle that orbits the nucleus of an atom.
Proton Positive particle found in the nucleus of an atom.
Neutron Particle with a neutral charge found in the nucleus of an atom
Density Having to do with how closely packed the atoms or molecules of a substance are.
Created by: darrin_evans