Science - Mixtures (Revision)

Filtration

separates an insoluble solid from a liquid. 

Decantation

separates a liquid from a settled solid by carefully pouring off the liquid, leaving the heavier liquid to sink to the bottom as the lighter one stays on top.

Distillation

a scientific method used to seperate/purify liquids in a mixture by heating them into a gas and then cooling the gas back into a liquid.

chromatography

technique used to separate a mixture into its individual parts (pen inks).

magnetic seperation

a physical method using magnetic fields to pull magnetic material out of a mixture, leaving non-magnetic material behind (separating the two).

centrifugation

a scientific technique that uses rapid spinning to seperate different parts of a liquid mixture based on density and weight. (separating blood cells from clear liquid plasma).

compound

two/more elements chemically bonded

mixture

two or more pure substances mixed together

suspension

a type of mixture where visible, undissolved solid particles are spread throughout a liquid/gas (muddy water-dirt particles drift in the liquid)

colloid

mixture where tiny, insoluble of a substance are suspended evenly throughout another substance (fog)

what is the formula for density?

mass over volume.

solution

a substance (solute) completely dissolved in another (solvent)

correct units for measuring density

g/ml, kg/m3 & g/cm3.