click below
click below
Normal Size Small Size show me how
States of Matter
Term | Definition |
---|---|
Solid | A state in which a substance has definite volume and shape |
Liquid | A state in which a substance has a definite volume but no fixed shape |
Gas | A state with no definite volume or shape |
Elements | A substance which cannot be split into a simpler substance |
Mixtures | A blend of two or more elements / compounds which are not chemically combined |
Compounds | A combination of two or more elements bonded together in some way |
Physical changes | A change in physical property (state), which can be undone |
Chemical changes | A change due to a reaction, makes a new substance and cannot be undone |
Melting | Changing from solid to liquid |
Freezing | Changing from liquid to solid |
Boiling | Changing a liquid to a gas / vapour |
Evaporating | Changing from liquid to gas |
Condensing | Change from gas to liquid |
Sublimation | Change from solid to gas |
Dissolving | Mixing a solid into a liquid with particles too small to see |
Vapour | Similar to gas, no definite volume or shape |
Particles | What matter is made of |
Pure | Substance made of only one element or compound |
Diffusion | The process of things mixing without any help |
Expansion | Particles speed up, moving faster, getting further apart and taking up more space |
Contraction | Particles slow down, moving slower, getting closer together and taking up less space |
Mass | How much matter is in an object |
Density | How much matter there is for the volume of an object |
Volume | Amount of space an object takes up |
Solute | Solid, dissolves in solvent |
Solvent | Liquid, dissolves the solvent |
Soluble | Able to dissolve |
Suspension | A solution which separates over time |
Concentration | How much solute is in the solution |
Reactant | Substance present at the start of a chemical reaction |
Product | Substance formed in a chemical reaction |
Sieving | Pouring a mixture through a sieve to remove large solids |
Decanting | Pouring off water in a mixture |
Distilling | Evaporating liquid out of a mixture and collecting it in another container |
Filtering | Pouring a mixture through a paper filter to remove solids |
Magnetism | Using magnets to remove metals from a mixture |
Crystallisation | Forming crystals by evaporating the liquid away |
Chromatography | Separating ink colours on paper using water |
Particle theory | Particles are too small to see. There are spaces between them. Particles are always moving. High temperatures make particles move faster. There are attractive forces keeping the particles together. |