Changes in State:
Changes among the states of matter.

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Chemical Change or Chemical ReactionsAny change in which one or more substances are converted into different substances with different characteristic properties.
Chemical CompoundIs a pure substance that can be decomposed into two or more simpler substances by a chemical change.
Chemical PropertyThe ability of a substance to undergo a change that alters its identity.
ChemistryIs the study of the composition, structure, and properties of substances and the changes they undergo.
ElementA pure substance that cannot be decomposed by ordinary chemical change.
EndothermicA process that absorbs heat.
EnergyIs the ability to cause change or the ability to do work.
Extensive Physical PropertyDepend on the amount of matter present and include mass, length, and volume.
ExothermicA process that releases heat.
Gaseous StateThe state of any matter that has neither a definite shape nor a definite volume.
Groups or Families:The vertical columns of elements in the Periodic Table.
Heterogeneous MixtureA mixture that it is not uniform.
Homogenous MixtureA mixture that is uniform.
HypothesisA testable statement.
InertiaThe resistance an object has to a change in movement.
Intensive Physical PropertyDo not depend on the amount of matter present and include melting point, boiling point, density, and ductility.
Kinetic EnergyEnergy of an object or objects in motion.
Law of Conservation of EnergyEnergy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means.
Law of Conservation of MassIt states that matter can be neither created nor destroyed in ordinary chemical or physical changes.
Law of Definite CompositionA chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or the source of the compound.
LawA generalization that describes a wide variety of behaviors in nature with mathematical backing.
Liquid StateThe state of any matter that has a definite volume and the ability to flow and take the shape of a container.
MassA measure of the quantity of matter.
MatterIs anything that has mass and occupies space.
MetalA good conductor of heat and electricity.
MetalloidIs an element that has some properties characteristics of metals and other characteristics of nonmetals, and is a semiconductor.
MixtureA combination of two or more kinds of matter each of which retains its own composition and properties.
NonmetalAre poor conductors of heat and electricity.
PeriodThe horizontal rows of elements in the Periodic Table.
PhasesPortions of matter that have the same chemical and physical properties.
Physical ChangeAny change in a property of matter that does not result in a change in identity.
Physical PropertyThis can be observed or measured with out altering the identity of the material.
PlasmaIs a gaseous system composed of positively charged particles and negatively charged electrons.
PrecipitateA solid that separates from solution.
Potential EnergyStored energy by position or composition.
ProductsThe new substance or substances produced by a chemical reaction.
PropertiesAre characteristics that enable us to distinguish one kind of matter from another.
Pure SubstanceA homogenous sample of matter that has the same composition and properties, whatever its source.
Qualitative InformationNonnumeric information that is collected.
Quantitative InformationNumeric information that is collected.
ReactantsSubstance or substances that undergo a chemical reactions
Scientific MethodA logical approach to the solution of problems that lend themselves to investigations by observing, generalizing, theorizing, and testing.
Solid StatesThe state of matter that has a definite shape and volume.
SolutionA homogenous mixture.
TheoryA broad generalization that explains a body of known facts, however they are never proven nor disproved.

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WeightA measurement of the Earth’s gravitational attraction for matter.