<p> Name: ______1.4.9 Human Impact on an Ecosystem 1 Pollution Worksheet</p><p>Human Impact on Ecosystems We are going to look at 3 ways that humans affect ecosystems: • ______</p><p>• ______</p><p>• ______</p><p>Pollution must be related to habitat studied.</p><p>Pollution Pollution is ______It is the ______and affects ______, ______, ______, ______and ______. Chemicals of human origin that harm the environment are called ______.</p><p>Some types of Pollution</p><p>1. ______2. ______3. ______4. ______</p><p>Pollutants are produced by ______</p><p>• CO2 from respiration is ______– why? ______</p><p>• excess CO2 from burning fossil fuels is</p><p>• SO2 from marshes & volcanoes is ______– why? ______</p><p>• SO2 from factory chimney is Page 1 of 5 Name: ______</p><p>Pollutants Some pollutants are ______in an environment, e.g. ______, but levels are ______by human activity. Other pollutants never exist in an environment e.g. ______</p><p>From the Syllabus & Guidelines</p><p>The Syllabus states: “Study the effects of any one pollutant.” The Guidelines for Teachers states: “Give the effects of one pollutant from any of the following areas: domestic, agricultural, industrial.” and “Give an example of one way in which pollution may be controlled in the selected area.” What follows is only a sample of the pollutants available. </p><p>Effect of one pollutant from one area - Agricultural, Industrial or Domestic</p><p>Area Pollutant Source Effects</p><p>Agricultural</p><p>Industrial</p><p>Domestic</p><p>Eutrophication & Algal bloom eutrophication: a condition where lakes become ______, resulting from excess artificial fertilisers washed into rivers and lakes. There is a ______(algal bloom) as they use up the nutrients. When ______the ______and are ______, which ______in the water resulting in the ______such as fish. </p><p>Page 2 of 5 Name: ______</p><p>Control of Pollutants in the selected area - Agricultural, Industrial or Domestic Area Pollutant Control Measures</p><p>Slurry & Agricultural Fertiliser</p><p>Sulphur Industrial dioxide</p><p>Domestic Plastic bags</p><p>Ecological impact of one human activity</p><p>Burning Fossil Fuels</p><p>Acidic oxides and acid rain • All rain is acidic – ______</p><p>• CO2 in the air dissolves in rainwater to form ______– pH = 5.5 in unpolluted air</p><p>• Acid rain refers to ______with a pH of ______(Note: pH 4.5 is 10 times more acidic than pH 5.5)</p><p>Acid rain</p><p>• Burning of fossil fuels (e.g. ______) releases ______into the air, especially ______and nitrogen oxides </p><p>(NOx)</p><p>• SO2 dissolves in rainwater to form ______(H2SO3) or reacts with particles in the air to form ______(H2SO4)</p><p>Page 3 of 5 Name: ______</p><p>• The resulting rain is ______and can be ______</p><p>Effects of acid rain</p><p>• Reduces ______</p><p>• Phosphorus (P) ______and is ______to plant roots</p><p>• ______becomes soluble and poisonous and with ______, ______and ______is washed (leached) from the soil into lakes and water supplies Soil is ______and ______in highly mineralised water. Why? ______</p><p>Effects of acid rain</p><p>• Erodes ______buildings</p><p>• Causes ______– irritates the delicate lining of the lungs • Inhibits ______formation and ______of plants</p><p>Effects of acid rain Acid rain is a ‘______’ i.e. it is formed in one country but transported or blown huge distances to another. Norway ‘imported’ its acid pollutions from the ______and the ______in Germany. • Ireland is lucky that the prevailing winds are from the Atlantic and not from Europe.</p><p>Dealing with acid rain</p><p>• Reducing the ______</p><p>• Using ______</p><p>Page 4 of 5 Name: ______</p><p>(‘scrubbers’ are fitted to the insides of chimneys) • ______fitted to modern cars</p><p>• Developing ______sources</p><p>Need to know</p><p>• Define the term: Pollution. </p><p>• State areas affected by pollution.</p><p>• State mechanisms to control pollution.</p><p>• Explain the difference between the terms pollutant and pollution.</p><p>• Discuss the ecological impact of one human activity.</p><p>END</p><p>Page 5 of 5</p>