solid - Firm or stable in shape., liquid - A substance that flows easily but has constant volume - with particles close but moving around., gas - A substance with no fixed shape that will expand to fill the whole of a container - particles are far apart and moving around, heating - Raising the temperature of something., cooling - Lowering the temperature of something., freezing - Turning into ice or another solid as a result of cooling., freezing point - The temperature at which a liquid turns into a sold when cooled., melting - Turning into a liquid as a result of heating., melting point - The temperature at which a solid will melt., temperature - A measure of how hot or cold something is., condensation - The process of turning from vapour (a gas) into a liquid., evaporation - The process of turning from a liquid into a vapour (a gas)., precipitation - Examples of this are rain, snow, sleet, dew, etc. formed by condensation of water vapour in the atmosphere., water cycle - The process by which water on Earth evaporates, then condenses in the atmosphere, and then returns to Earth in the form of precipitation., reversible change - A change that can be changed back again. , irreversible change - A change that cannot be changed back again. , particles - A tiny amount or small piece., state - The particular condition that someone or something is in at a specific time., molecules - The smallest unit of a substance that has all the properties of that substance., energy - The ability to do work.,

States of Matter vocabulary Year 4

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