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| accumulation of chemicals from the environment into organism |
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| where chemicals concentrations increase as they move into higher trophic levels, not all chemicals biomagnify |
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| chemicals ‘hop’ from region to region, end up in Northern/colder regions, snow pulls chemicals out of the atmosphere |
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| What does the dose makes the poison mean? |
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| the chemical and the concentration that the chemical is in depends on how poisonous it is |
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| how toxic is the chemical |
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| probability that toxicity will occur |
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| the capacity of a chemical to cause injury |
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| the science of defining the concentration or doses at which chemicals cause injuries to organisms |
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| Lethal dose, killing 50% of the population |
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| exposure lasting short duration |
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| determining how dangerous a chemical is |
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| atoms of the same element with a different number of neutrons |
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unit of measurement for a trace gas in the Earths atmosphere
0.01 mm at ground level |
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| scenarios generally presented in IpCC reports, representing the outcomes of distinct narratives of economic development and demographic and technological change |
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| past ice ages are linked to regular variations in the Earths orbit around the sun |
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| Enhanced greenhouse effect |
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| different combinations of: carbon, chlorine, and flourine |
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| What do greenhouse gasses do? |
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| absorb heat into the atmosphere |
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| release of sulphur dioxide and nitrogen oxides that undergo reactions in the atmosphere. |
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| concentration of hydrogen ions in a solution |
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| Does acidification happen right away? |
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-no, takes time
– some of the acidity is buffered by the soil |
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| estimate of the maximum level of S and N deposition that a system can receive without biological damage occurring |
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| a colourless, odourless gas and a major component of smog |
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| colourless gas that smells like burnt matches |
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| this government department managed the science for understanding the allowable catch in the cod industry |
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| Department of Fisheries and Oceans |
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| The ozone layer refers to a decreased concentration of ozone in what part of atmosphere? |
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| What compound makes certain areas and soils less susceptible to acid deposition? |
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| What phenomenon is critical to understanding why ozone levels drop so much over the Antarctic in southern hemisphere spring? |
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| Polar stratospheric clouds |
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| One of the primary challenges in restoring an ecosystem is answering what question? |
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-What is natural
-What state are we restoring the system to |
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| excessive loading of plant nutrients, especially nitrogen and phosphorus and organic matter |
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| Restoring and ecosystem involves restoring these two characteristics |
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| Unpolluted, natural precipitation has this pH? |
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| Acid rain can damage ecosystems by mobilizing these chemicals? |
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| expansion in environmental groups |
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| contraction of environmental groups |
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| small groups that mobilize around issues of community concern |
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| Organizations based around the collection and analysis of scientific of legal data, which is then used to inform policy |
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-industrialization is not sustainable
-based on the conservations of forever of the agricultural soils of the world |
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| Hills first law of environmental science |
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| pessimism is a self-fulfilling prophesy |
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| Equitable and fair distribution of resources and environmental risks, within and between generations |
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| competitiveness remains paramount |
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