4.9.3 Common atmospheric pollutants and their sources Flashcards
What is a major source of atmospheric pollutants?
The combustion of fuels is a major source of atmospheric pollutants.
What elements do most fuels contain?
Most fuels, including coal, contain carbon and/or hydrogen and may also contain some sulfur.
What gases are released when a fuel is burned?
The gases released may include carbon dioxide, water vapour, carbon monoxide, sulfur dioxide, and oxides of nitrogen.
What solid particles may be released during fuel combustion?
Solid particles and unburned hydrocarbons may be released, forming particulates in the atmosphere.
What should students be able to describe regarding fuel combustion?
Students should be able to describe how carbon monoxide, soot, sulfur dioxide, and oxides of nitrogen are produced by burning fuels.
What should students be able to predict about fuel combustion?
Students should be able to predict the products of combustion of a fuel given appropriate information about the composition of the fuel and the conditions in which it is used.
What is carbon monoxide and why is it dangerous?
Carbon monoxide is a toxic gas that is colourless and odourless, making it difficult to detect.
What health problems are caused by sulfur dioxide and oxides of nitrogen?
Sulfur dioxide and oxides of nitrogen cause respiratory problems in humans and contribute to acid rain.
What effects do particulates have on the environment and health?
Particulates cause global dimming and health problems for humans.
What should students be able to explain regarding atmospheric pollutants?
Students should be able to describe and explain the problems caused by increased amounts of these pollutants in the air.
