science test Flashcards
sorting
physically separating large pieces of a mechanical mixture so that similar pieces are together
floating
a separation technique in which a “lighter” component rises to the top of a liquid where it can be skimmed or poured off
settling
a separation technique in which a heavier liquid sinks to the bottom of a liquid, and the liquid can be poured off
sieve
a device used to separate the components of a mixture with many visible holes that allow smaller solid pieces and liquids to pass through while leaving the lager solid pieces
sieving
the process of passing a mechanical mixture through a sieve to separate the larger pieces of matter from the smaller ones
filter
a device with many small holes that trap solid pieces of a mixture but allows liquids and gases to pass through
filteration
the process of passing a mechanical mixture through a filter to separate the solid pieces from a liquid or gas
sewage
the mixture of water and waste that is flushed down toilets and sink drains
evaporate
the change from a liquid to a gas
evaporation
the process by which a sample of matter changes from a liquid to a gas
distilliation
the process of separating liquids in a solution by heating the solution, trapping and cooling the gas, and collecting the resulting pure liquid
dissolving
if one part of a mixture dissolves easily in a solvent, you can separate this part from the rest of the mixture
using a magnet
you can use a magnet to separate a mixture that has one part that is attracted to a magnet
electric generator
a machine with moving pats that produce electricity when they spin
primary treatment
sieving, settling, floating
