# Heat Definitions

Flashcards by mckenziedev, updated more than 1 year ago
 Created by mckenziedev over 7 years ago
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### Description

1 Physics (Heat) Flashcards on Heat Definitions, created by mckenziedev on 09/07/2013.

## Resource summary

 Question Answer Heat A form of energy which can be transformed. It is the total kinetic and potential energies of the particles that make up the object Temperature A measure of the average kinetic energy of the particles that make up a substance Joule The unit for energy Celsius A temperature scale based around the melting and boiling points of water Kelvin A temperature scale that starts from absolute zero Hotter A term used to describe an object with greater temperature/average kinetic energy of its particles Colder A term used to describe an object with lower temperature/average kinetic energy of its particles Change Of State Adding or removing heat changes the kinetic energy of the particles and can cause the object to move form one state to another Thermal Conductor An object that allows heat to flow through it Thermal Insulator An object that restricts the flow of heat through it Conduction The heat transfer process which occurs because objects are touching Convection The heat transfer process that occurs because objects are fluid/can move Radiation The heat transfer that occurs without the need for particles/can travel through a vacuum Vacuum A region with no particles Density The mass per unit volume of a substance Convection Current The flow of particles due to the heating and cooling of the object Solid Particles packed tightly together in a fixed position. They are gently vibrating, but are held together by strong forces Liquid Particles are moving and can slide past each other. They are held together by weaker forces and not in a fixed pattern Gas Particles are spaced far apart and move about very quickly. The forces trying to hold them together cannot overcome their rapid movement Melting Particles gain kinetic energy and spread out/vibrate more to go from a solid to a liquid Evaporating Particles in a liquid gain more kinetic energy and therefore take up more room and turn into a gas Sublimation A solid turns to a gas state without change to a liquid Freezing A liquid turns to a solid because of a sudden loss of kinetic energy to the particles Condensation A gas turns to a liquid state Deposition A gas turns to a solid state without changing to a liquid Specific Heat Capacity The amount of energy needed to change the temperature of 1kg of the substance by 1 degree c Latent Heat of Vaporisation Used for changes between liquid and gas (evaporating/condensing) Latent Heat of Fusion The amount of energy used for changes between solid and liquid (melting/freezing) Latent Heat How much heat energy is absorbed or released when a substance changes state without changing temperature Power A measure of the rate of heat energy absorbed or released when a substance changes temperature

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