Science- Term 2 Test (water In The World) Flashcards
Centrifuging
A technique used to separate light from heavy particles by rapidly spinning the mixture.
Colloid
A type of mixture that always looks cloudy because clumps of insoluble particles remain suspended throughout it
Example: mud, sand and water, slime
Concentration
How much solute is dissolved in a solvent
Condensation
The cooling of gas into a liquid
Crystallisation
A separating technique uses evaporation to remove a dissolved solid from a liquid, after the liquid has been evaporated the solid remains.
Example: used to get the salt from sand
Decanting
Technique used to separate a sediment from the liquid by carefully pouring the liquid away
Distillation
Technique that uses evaporation and condensation to separate a solid contaminant and the solvent in which it has dissolved
Evaporation
Turning liquid into gas (when the liquid reaches boiling point)
Filtering
A technique used to separate different sized particles in a mixture depending on the holes in the filter
Flocculants
chemicals added to a mixture to make suspended particles clump together
Heterogeneous
Example: cake and fruit, orange juice with pulp, salt and sand
Residue
The substance left behind in a sieve or filter
Sediment
Something that settles to the bottom of a mixture
Solubility
How easily substance dissolves in a solvent
Soluble
Can be dissolved in liquid
