Question | Answer |
Heat | Form of energy that can be transmitted from one place to another through conduction, convection, or radiation – condition of being hot |
Physical Change | Change that occurs in matter and can be returned to its original condition |
Expansion | The increase in volume of matter that occurs when matter is heated |
Contraction | The decrease in volume of matter due to the lack of heat |
Temperature | The measurement of how hot an object or substance is |
Conduction | Transmission of heat by transferring energy from one particle to another |
Convection | Transfer of heat from one place to another by the circulation of currents of heated particles of a gas or liquid |
Radiation | Energy (heat) given off by electromagnetic waves (waves we can’t see) |
Phase Change | The changing from a solid to a liquid to a gas or a gas to liquid to solid through change in energy |
Solid | Has definite volume and shape, and its particles are closely packed and tight with little energy |
Liquid | Has definite volume and no definite shape, particles are not as closely packed and tight as solids – has some energy |
Gas | No definite shape or volume, particles a loosely packed and moving with a lot of energy |
Melting | Changing from a solid to a liquid- Energy increase |
Freezing | Changing from a liquid to a solid – Energy decrease |
Boiling | Changing from a liquid to a gas at the substance’s boiling point- Energy increase |
Evaporation | Changing from a liquid to a gas from the surface of a liquid |
Condensation | Changing from a gas to a liquid – Energy decrease |
Sublimation | Changing from a solid to a gas skipping the liquid phase |
Freezing/Melting Points | 0 degrees Celsius (Water)- freezing
Greater than 0 degrees - melts
Less than 0 degrees - freezes |
Boiling Point | Water – 100 degrees Celsius
The point at which a liquid turns into a gas |
Conservation on Mass | No matter is gained or lost when a substance undergoes a phase change |