Question | Answer |
The temperature at which a substance changes from a liquid to a gas; the same as the condensation point, or temperature at which a gas changes to a liquid. | Boiling point |
The temperature at which a substance changes from a solid to a liquid; the same as the freezing point, or temperature at which a liquid changes to a solid. | Melting point |
A solid made up of particles that are not arranged in a regular pattern. | Amorphous solids |
A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern. | Crystalline solids |
Energy from the sun. | Radiant Energy |
The lowest possible temperature at which thermal energy is as close to zero as it can be, approximately -273 degrees Celsius. | Absolute zero |
The force of pushing on a surface divided by the area of that surface. | Pressure |
A solid, liquid, and gas. | States of matter |
A state of matter that has a definite shape and a definite volume. | Solid |
A state of matter that has no definite shape but has a definite volume. | Liquid |
A state of matter with no definite shape or volume. | Gas |
The change of state from a gas to a liquid. | Condensation |
The change of state from a liquid to a gas. | Vaporization |
Any substance that can flow. | Fluid |
The change in state from a solid to a liquid. | Melting |
The change in state from a liquid to a solid. | Freezing |
The direct transfer of heat from one substance to another. | Conduction |
The transfer of heat by the motion of matter, such as by moving air or water. | Convection |
The process that occurs when vaporization takes place inside a liquid as well as on the surface. | Boiling |
The process that occurs when vaporization takes place only on the surface of a liquid. | Evaporation |
The results of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together; causes the surface to act as if it has a thin skin. | Surface tension |
The change in state from a solid directly to a gas without passing through the liquid state. | Sublimation |
A measure of the average energy of motion of the particles of a substance. | Temperature |