Terms - 1A Vocab

1A Terms List

purity: free from impurities

filteration: solid particles separated from a liquid by passing the mixture through a material that retains the solid particles and allows the liquid to pass through

filtrate: the liquid collected after it has been filtered 

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 (by all laboratory groups in the class).

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:  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. 

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.

aquifer: a water-bearing layer of rock, sand, or gravel.