purity: clean, free from
impurities
filtrate: the liquid collected
after it has been filtered (through sand/gravel filtration)
adsorb: to attract and hold
onto a surface
percent recovery: percent of original
foul water sample recovered as purified water
purified water: water that has been
cleaned through a process of filtration/purification. The final step of
purification is distillation
histogram: shows percent
recovery obtained
range: the difference
between the largest and smallest values in a data set
average/mean: average value found
by adding all values together and dividing the sum by the total number of
values
median: middle value
distillation: the process of
separating salt from water through evaporation and condensation in a
distillation apparatus
electrical
conductivity: focuses on the presence of dissolved, electrically charged
particles in water.
Tyndall Effect: the clarity of a
water sample tested by passing a beam of light through each sample. Presence or
absence of the Tyndall Effect.
pure: clean, purified
water cycle/hydrologic
cycle:
the cycle of water falling, evaporating into the air, condensing, and falling
again
direct water use: water that can be directly measured
indirect water use: hidden uses of
water
gaseous state: water vapor in the
air
liquid state: in lakes, rivers,
oceans, clouds, and rain
solid state: ice
surface water: a river or other
body of water
groundwater: a well- must be
pumped to the surface
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