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23 Cards in this Set

  • Front
  • Back
Chemical Property
any characteristic of a substance that indicated whether it can undergo a certain change.
Chemical Change
change of one substance into a new one.
Law of Conservation of Mass
Mass of all substances that are present before a chemical change equals the mass of all the substances that are remaining after the change.
Melting Point
Temperature at which a solid begins to liquify.
Heat of Fusion
amount of energy required to change a substance from the solid phase to the liquid phase.
Heat of Vaporization
amount of energy required for liquid particles to escape the attractive forces within the liquid or energy required to change from a liquid to gas.
Boiling Point
temperature at which the pressure of the atmosphere is equal to the pressure of a liquid's vapor and gas molecules can escape the attract, force between molecules.
spreading of particles throughout a given volume that are uniformly distruibuted.
Thermal Expansion
increase in the size of a substance that results from the separation of its molecules when the temperature is increased.
element or compound that can't be broken down into simpler components and maintain the properties of the origional substance.
substance with atoms that are all alike.
substance formed from 2 or more elements in which the exact combination and proportion of elements is always the same.
Heterogeneous mixture
misture in which difference materials are unevenly distributed and are easilt identified.
homogeneous mixture
solid, liquid, or gas that contains 2 or more substances blended evenly throughout.
mix that appears to have the same composition, color, density, and taste throughout and is mixed at the atomic or colecular level.
hetergeneous mix whose particles never settle.
tyndall effect
scattering of a light beam as it passes through a colliod.
heterogeneous mix containing a liquid in which visible particles settle.
Physical property
any characteristic of a material that you can observe or attempt to without changing the idenity of the material.
Physical change
any change in size, shape, or state, of matter in which the idenity of the substance remains the same.
high temperature gas with an overall neutral charge that is the most common state of matter in the universe.
a fluid's resistance to flow.
Kinetic theory
explanation of the behavior of molecules in matter: states that all matter made of constantly moving particles that collide without loosing energy.