environmental chemistry 4-6

any material that causes harm to a living organism

any change in the environment producing a condition to living things

parts per a million how many small parts are mixed into 1 million units

serious symptoms that occur after one exposure

symptoms that occur over a chemical, they happen over time not immediately

measuring a chemicals toxicity levels, a legal dose of a chemical that will kill 50% of the population applied to it

it is an evaluation of the safety of an activity

macro invertebrates help indicate the quality of water and biodiversity supports a healthy ecosystem with more oxygen producing organisms

they enter the water unnaturally and causes algae and aquatic plants to over grow, this causes oxygen levels to drop and creates struggle for other aquatic life to survive

are organisms that researchers can watch to see how the health of the ecosystem and food chains

persistent- broken down slowly or not at all (heavy metals or chemical) non- broken down by natural means like chemical reaction r bacterial actions (sewage)

containing everyday waste with a short term solution using clay and plastic, prevents blowing trash and scavengers

used to contain hazardous waste using clay, gravel and plastic to collect seepage

Contamination of the air by harmful substances

man- vechile emissions, burning fuels natural- fires, volcanoes

the law requires phosphates and nitrogen to be removed before returning water to its source

1- removes float able and settable solar materials from raw sewage 2- removes dissolved and suspended organic matter remaining after the first separation 3- the final polishing stage of Wastewater treatment removes anything remaining

using living organisms to take in pollutants, they make it less toxic

ground water is the water that filters through the spaces in the soil a well is dilled into the ground to collect it (Aquifers)

substances that can be broken down by fungi and bacertica and turn into carbon dioxide

discarded wastes known to be harmful