Matter Unit Vocab Flashcards
Vocab Flashcards
Element or compound that cannot be broken down into simpler components and maintain the properties of the original substance.
Substance
Substance with atoms that are all alike.
Element
Substance formed from two or more elements in which the exact combination and proportion of elements is always the same.
Compound
Mixture such as missed nuts or a dry soup mix, in which different materials are unevenly distributed and are easily identified.
Heterogeneous Mixture
Solid, liquid, or gas that contains two or more substances blended evenly throughout.
Homogeneous Mixture
Homogeneous mixture that remains constantly and uniformly mixed and has particles that are so small they cannot be seen with a microscope.
Solution
Heterogeneous mixture whose particles never settle.
Colloid
Scattering of a light beam as it passes through a colloid.
Tyndall Effect
Heterogeneous mixture containing a liquid in which visible particles settle.
Suspension
Any characteristic of a material, such as size or shape, that you can observe or attempt to observe without changing the identity of the material.
Physical Property
Any change in size, shape, or state of matter in which the identity of the substance remains the same.
Physical Change
Process than can separate two substances in a mixture by evaporating a liquid and recondensing its vapor.
Distillation
Any characteristic of a substance, such as flammability, that indicates whether it can undergo a certain chemical change.
Chemical Property
Change of one substance into a new substance.
Chemical Change
Substances present before a chemical change equals the mass of all the substances remaining after the change.
Law of Conservation of Mass
Explanation of the behavior of molecules in matter; states that all matter is made of constantly moving particles that collide without losing energy.
Kinetic Theory
Temperature at which a solid begins to liquefy.
Melting Point
Amount of energy required to change a substance from the solid phase to the liquid phase.
Heat of Fusion
The temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid.
Boiling Point
The amount of energy required for the liquid at its boiling point to become a gas.
Heat of Vaporization
Spreading of particles throughout a given volume until they are uniformly distributed.
Diffusion
Matter consisting of positively and negatively charged particles.
Plasma
Increase in the size of a substance
when the temperature is increased.
Thermal Expansion
Ability of a fluid—a liquid or a gas—to exert an upward force on an object immersed in the fluid.
Buoyancy
