Matter Flashcards
A type of matter with a fixed composition. It can be either element or compound.
Substance
If all the atoms in a substance have the same identity.
Element
A substance in which the atoms of two or more elements are combined in a fix proportion.
Compound
A mixture in which different materials can be distinguished easily.
Heterogeneous mixture
Contains two or more gaseous, liquid, or solid substances blended evenly throughout.
Homogeneous mixture
A homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of the container.
Solution
A type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.
Colloid
The scattering of light by colloidal particles.
Tyndall effect
A heterogeneous mixture containing a liquid in which visible particles settle.
Suspension
Any characteristic of a material that you can observe without changing the identity of the substances that make up the material.
Physical property
A change in size, shape, or state of matter.
Physical change
The process for separating substances in a mixture by evaporating a liquid and reconsidering its vapor.
Distillation
A characteristic of a substance that indicates whether it can undergo a certain chemical change.
Chemical property
A change of one substance to another.
Chemical change
The mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change.
Law of Conservation of Mass
An explanation of how particles in matter behave.
Kinetic Theory
The temperature at which a solid begins to liquefy
Melting Point
The amount of energy required to change a substance from the solid phase to the liquid phase at its melting point.
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
The spreading of particles throughout a given volume until they are uniformly distributed.
Diffusion
Matter consisting of positively and negatively charged particles.
Plasma
An increase in the size of a substance when the temperature is increased.
Thermal expansion
The ability of a fluid- a liquid or a gas- to exert an upward force on an object immersed in it.
Buoyancy
