Words (or words that have the same definition) The definition is case sensitive (Optional) Image to display with the definition [Not displayed in Glossary, only in pop-up on pages] (Optional) Caption for Image (Optional) External or Internal Link (Optional) Source for Definition (Eg. "Genetic, Hereditary, DNA ...") (Eg. "Relating to genes or heredity") NaN The infamous double helix https://bio.libretexts.org/ CC-BY-SA; Delmar Larsen Word(s) Definition Image Caption Link Source accuracy how closely a measurement aligns with a correct value NaN NaN NaN NaN atom smallest particle of an element that can enter into a chemical combination NaN NaN NaN NaN Celsius (°C) unit of temperature; water freezes at 0 °C and boils at 100 °C on this scale NaN NaN NaN NaN chemical change change producing a different kind of matter from the original kind of matter NaN NaN NaN NaN chemical property behavior that is related to the change of one kind of matter into another kind of matter NaN NaN NaN NaN chemistry study of the composition, properties, and interactions of matter NaN NaN NaN NaN compound pure substance that can be decomposed into two or more elements NaN NaN NaN NaN cubic centimeter (cm3 or cc) volume of a cube with an edge length of exactly 1 cm NaN NaN NaN NaN cubic meter (m3) SI unit of volume NaN NaN NaN NaN density ratio of mass to volume for a substance or object NaN NaN NaN NaN dimensional analysis (also, factor-label method) versatile mathematical approach that can be applied to computations ranging from simple unit conversions to more complex, multi-step calculations involving several different quantities NaN NaN NaN NaN element substance that is composed of a single type of atom; a substance that cannot be decomposed by a chemical change NaN NaN NaN NaN exact number number derived by counting or by definition NaN NaN NaN NaN extensive property property of a substance that depends on the amount of the substance NaN NaN NaN NaN Fahrenheit unit of temperature; water freezes at 32 °F and boils at 212 °F on this scale NaN NaN NaN NaN gas state in which matter has neither definite volume nor shape NaN NaN NaN NaN heterogeneous mixture combination of substances with a composition that varies from point to point NaN NaN NaN NaN homogeneous mixture (also, solution) combination of substances with a composition that is uniform throughout NaN NaN NaN NaN hypothesis tentative explanation of observations that acts as a guide for gathering and checking information NaN NaN NaN NaN intensive property property of a substance that is independent of the amount of the substance NaN NaN NaN NaN kelvin (K) SI unit of temperature; 273.15 K = 0 ºC NaN NaN NaN NaN kilogram (kg) standard SI unit of mass; 1 kg = approximately 2.2 pounds NaN NaN NaN NaN law statement that summarizes a vast number of experimental observations, and describes or predicts some aspect of the natural world NaN NaN NaN NaN law of conservation of matter when matter converts from one type to another or changes form, there is no detectable change in the total amount of matter present NaN NaN NaN NaN length measure of one dimension of an object NaN NaN NaN NaN liquid state of matter that has a definite volume but indefinite shape NaN NaN NaN NaN liter (L) (also, cubic decimeter) unit of volume; 1 L = 1,000 cm3 NaN NaN NaN NaN macroscopic domain realm of everyday things that are large enough to sense directly by human sight and touch NaN NaN NaN NaN mass fundamental property indicating amount of matter NaN NaN NaN NaN matter anything that occupies space and has mass NaN NaN NaN NaN meter (m) standard metric and SI unit of length; 1 m = approximately 1.094 yards NaN NaN NaN NaN microscopic domain realm of things that are much too small to be sensed directly NaN NaN NaN NaN milliliter (mL) 1/1,000 of a liter; equal to 1 cm3 NaN NaN NaN NaN mixture matter that can be separated into its components by physical means NaN NaN NaN NaN molecule bonded collection of two or more atoms of the same or different elements NaN NaN NaN NaN physical change change in the state or properties of matter that does not involve a change in its chemical composition NaN NaN NaN NaN physical property characteristic of matter that is not associated with any change in its chemical composition NaN NaN NaN NaN plasma gaseous state of matter containing a large number of electrically charged atoms and/or molecules NaN NaN NaN NaN precision how closely a measurement matches the same measurement when repeated NaN NaN NaN NaN pure substance homogeneous substance that has a constant composition NaN NaN NaN NaN rounding procedure used to ensure that calculated results properly reflect the uncertainty in the measurements used in the calculation NaN NaN NaN NaN scientific method path of discovery that leads from question and observation to law or hypothesis to theory, combined with experimental verification of the hypothesis and any necessary modification of the theory NaN NaN NaN NaN second (s) SI unit of time NaN NaN NaN NaN SI units (International System of Units) standards fixed by international agreement in the International System of Units (Le Système International d’Unités) NaN NaN NaN NaN significant figures (also, significant digits) all of the measured digits in a determination, including the uncertain last digit NaN NaN NaN NaN solid state of matter that is rigid, has a definite shape, and has a fairly constant volume NaN NaN NaN NaN symbolic domain specialized language used to represent components of the macroscopic and microscopic domains, such as chemical symbols, chemical formulas, chemical equations, graphs, drawings, and calculations NaN NaN NaN NaN temperature intensive property representing the hotness or coldness of matter NaN NaN NaN NaN theory well-substantiated, comprehensive, testable explanation of a particular aspect of nature NaN NaN NaN NaN uncertainty estimate of amount by which measurement differs from true value NaN NaN NaN NaN unit standard of comparison for measurements NaN NaN NaN NaN unit conversion factor ratio of equivalent quantities expressed with different units; used to convert from one unit to a different unit NaN NaN NaN NaN volume amount of space occupied by an object NaN NaN NaN NaN weight force that gravity exerts on an object NaN NaN NaN NaN