Create an account
research that focuses on developing applications of knowledge gained through basic research
a close agreement by competent observers who make a series of observations about the same phenomenon
an organized body of knowledge resulting from our observations, common sense, rational thinking, and insight into nature
a general hypothesis or statement about a relationship of natural quantities that has been tested and supported by experimental data over and over again; also known as a principle
a well-tested hypothesis that unifies a broad range of observations within the natural world
the lowest possible temperature, which is the temperature at which atoms of a substance have no kinetic energy: 0 K = -273.15C = -459.7F
a medieval field of study concerned primarily with finding potions that would produce gold or confer immortality
a gas law that describes the direct relationship between the volume of a gas and the number of gas particles it contains at constant pressure and temperature. The greater the number of particles, the greater the volume.
a gas law that describes the indirect relationship between the pressure of a gas sample and its volume at constant temperature. The smaller the volume, the greater the pressure;
P(1)V(1) = P(2)V(2)
a gas law that describes the direct relationship between the volume of a gas sample and its temperature at constant pressure. The greater the temperature, the greater the volume. V(1)/T(1) = V(2)/T(2)
matter that has neither definite volume or a definite shape, always filling any space available to it
the energy that flows from one object to another because of a temperature difference between the two
Ideal gas law
a gas law that summarizes the pressure, volume, temperature, and number of particles of a gas within a single equation, often expressed as PV = nRT, where P is pressure, V is volume, n is the number of molecules, R is the gas constant, and T is the temperature
kinetic molecular theory
a theory that explains solids, liquids and gases in terms of them consisting of rapidly moving tiny particles, either atoms or molecules or both
describes the realm of atoms and molecules, where objects are smaller than can be detected by optical microscopes
a measure of how warm or cold an object is relative to some standard. also a measure of the average kinetic energy per molecule of a substance, measured in degrees Celsius, degrees Fahrenheit, or kelvins.
the formation of new substance(s) by rearranging the atoms of the original material(s)
a notation that indicates the composition of a compound, consisting of the atomic symbols for the different elements of the compound and numerical subscripts indicating the ratio in which the atoms combine
a type of property that characterizes the ability of a substance to change into a different substance under specific circumstances
a notation that uses the atomic symbol and (sometimes) a numerical subscript to denote how many atoms are bonded in one unit of an element
a mixture in which the different components can be seen as individual substances
a mixture in which the components are so finely mixed that any one region of the mixture has the same ratio of substances as any other region
an element that is shiny, opaque, and able to conduct electricity and heat; also malleable and ductile
an element that exhibits some properties of metals and some properties of nonmetals. boron, B; silicon, Si; germanium, Ge; arsenic, As; antimony, Sb; tellurium, Te
an element located toward the upper right of the periodic table, with the exception of hydrogen, that is neither a metal or a metalloid
a chart in which all the known elements are organized by their physical and chemical properties
the gradual change of any property in the elements across a period of the periodic table
a change in which a substance changes its physical properties without changing its chemical identity
scanning probe microscope
a tool of nanotechnology that detects and characterizes the surface atoms of materials by way of an ultra-thin probe tip, whose movements are detected by laser light as it is mechanically dragged over the surface
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together