Human drinking water, recreation such as swimming, livestock drinking water, irrigation, protection of aquatic life.
What are the five categories of water use?
100
This chemical is a major air pollutant that forms both smog and acid rain.
What is Sulfur dioxide?
100
Temperature increase worldwide.
What is global warming?
100
Keeping track of something for a specific purpose.
What is MONITERING
100
In 1998,_____ emissions in Canada measured 2696kt.
What is SO2(g)?
200
An animal without backbone.
What is an invertebrate?
200
The main component of the air we breathe.
What is nitrogen?
200
Ultraviolet radiation.
What is UV?
200
Metals that have a density of 5 or higher.
What is heavy metals?
200
Canada has only 0.5% of the world's population, but we account for about _% of human caused carbon dioxide emissions.
What is 2%?
300
Dissolved oxygen, acidity, heavy metals, plant nutrients, pesticides and salts.
What are the six most commonly monitored things, as water indicators of water quality?
300
This chemical is known as the silent killer, because it is a odourless and coloress gas.
What is carbon monoxide?
300
Chlorofluorocarbons.
What is CFCs?
300
This describes how poisonous a substance is.
What is toxicity?
300
The insecticide pyrethrum is produced from plants such as chrysanthemums. It is used to eliminate pests such as ____.
What is aphids?
400
Parts per trillion.
What does PPT stand for?
400
Measuring the levels of pollutants in the air.
Estimating the amount of emissions from pollution sources.
What are the two ways air quaility can be determined?
400
Greenhouse effect made greater by human activities such as burning fossil fuels and clearing land, that add greenhouse gases to the atmosphere.
What is enhanced greenhouse effect?
400
lethal dose 50; amount of a substance that causes 50% of a group of test animals to die if they are given a specified dose of the substance all at once.
What is LD50?
400
This layer is 15 to 50 km above the Earth's surface, also exist at ground level.
What is the ozone layer?
500
Temperature, turbulence, the amount of photosynthesis by plants in water, and the number of organisms using oxygen in the water.
What does the level of dissolved oxygen depend on?
500
O3(g)
What is ozone?
500
This chemical is not considered a pollutant since it is naturaly present in the air. Hower, the increasing amount of it in the atmosphere has become a concern for governments and an important area of stuf for scientists.
What is carbon dioxide?
500
Measurement use to describe very small concentrations of chemicals.
What is parts per million?
500
A device that uses platinum and palladium catalysts to remove pollutants from vehicle exhaust.