<p> CHAPTER 7 Stewardship of Earth</p><p>7.2 Clean up our act! Name: </p><p>Activities</p><p>Remember 1. List the major reasons for the increase in pollution that has occurred since the 1700s.</p><p>2. In a scientific sense, what is meant by waste? </p><p>3. What is the gas that causes acid rain? </p><p>4. List the ways in which photochemical smog is similar to, and different from, acid rain. </p><p>5. State an example of something that can be reduced, re-used and recycled. </p><p>Think 6. Using knowledge gained in the previous chapter, explain what is meant by natural cycles can no longer maintain a balance between the breakdown and cycling of matter. </p><p>7. Suggest a practical strategy for reducing each of the five major causes of water pollution. </p><p>8. Suggest a specific action that you can take in your life for each of the three principles: reduce, re-use and recycle. </p><p>9. Pollution has not always been a source of public concern. This early poster, from what is now Russia, promotes progress. Suggest what the caption would read if translated. </p><p>Create 10. (a) Look at this cartoon and explain which issue the cartoonist wants you to think about. </p><p>(b) Write a story based on the issue raised by the cartoon. </p><p>(c) Draw your own cartoon to express your views on rubbish, litter and recycling. </p><p>Research 11. Select one of the following examples of pollution and research: © John Wiley & Sons Australia, Ltd 1 Jacaranda Science 2</p><p>(i) what it is</p><p>(ii) why it matters</p><p>(iii) how it is measured</p><p>(iv) what causes it </p><p>(v) what can be done to prevent it becoming a problem. </p><p>(a) Thermal pollution of water (b) Eutrophication (c) Hypoxia (d) Ozone depletion (e) Chlorofluorocarbon pollution (f) Nuclear fallout (g) Light pollution (h) Photochemical smog (i) Haze (j) Acid rain (k) Soil pesticide residues</p><p>12. Select one of the following organisations and research: (i) its mission</p><p>(ii) who governs or leads it</p><p>(iii) its main activities. </p><p>(a) Greenpeace (b) Environmental Protection Agency (c) Global Atmosphere Watch</p><p>Notes:</p><p>© John Wiley & Sons Australia, Ltd 2</p>