Environmental Chem 4-5

Question 1

Nitrogen & Phosphorous

Answer 1

makes plants grow but excessive amount causes loss of O2 & algal blooms

Question 2

Dissolved Oxygen

Answer 2

amount of O2 in water

Question 3

Oxygen Sag

Answer 3

decrease of dissolved O2 where pollutants have met water

Question 4

Undissolved Solids

Answer 4

solids left after waters drained (suspended)

Question 5

Biological Indicator

Answer 5

organism who’s population reveal state of environment (macroinvertebrates)

Question 6

Photosynthesis

Answer 6

process of plants converting sunlight into energy/glucose

Question 7

Cellular Respiration

Answer 7

chemical reactions breaking down glucose to produce ATP

Question 8

Algal Bloom

Answer 8

excessive nutrients (nitrogen & phosphates) cause overabundance of algae, less O2

Question 9

Concentration

Answer 9

of solute particles compared to the solutions volume (amount of solute in solution)

Question 10

Toxicity

Answer 10

Acute = harmful immediately after 1 exposure
Chronic = harmful after long term exposure

Question 11

Methyl Isocyanate

Answer 11

flammable compound that quickly evaporates when exposed to air

Question 12

Mercury & Lead

Answer 12

heavy metals that are acutely toxic and commonly found in environment

Question 13

LD50

Answer 13

amount of chemical killing half the # of organisms; lethal dose 50

Question 14

Thalidomide

Answer 14

tested on rats who received no harm but when used on pregnant women it causes defects to children

Question 15

Pollutant Dilution

Answer 15

making the pollutant less toxic or harmful (less concentration)