Laboratory Review 19 1. What results when sulfur dioxide and nitrogen oxides, fo
ID: 261785 • Letter: L
Question
Laboratory Review 19 1. What results when sulfur dioxide and nitrogen oxides, formed by burt enter the atmosphere? 2. What kind of polluti on results when water from a lake or the ocean is used to disperse waste heat? 3. Does the amount of oxygen dissolved in water increase or decrease when the temperature of the water increases? 4. What occurs to a body of water when there is runoff from agricultural fields? 5. Which population experiences growth referred to as a "bloom" when excess nutrients enter a body of water? 6. After excess nutrients cause algae to overgrow and then die, what causes the fish to die? 7. What do we call the number of different microorganisms observed and their relative abundance in the hay infusion culture? 8. What chemical was used to simulate the effect of acid rain on a hay infusion culture? 9. What does an unfavorable pH adversely affect that inhibits seed germination? 10. In the Experimental Procedure on the effect of acid rain on seed germination, if 18 of the sunflower seeds germinated in the 1% vinegar solution, what percent germinated? 11. What kind of animal is Gammarus? 12. What will Daphnia do that might prevent cultural eutrophication from occurring? 13. Are there more or fewer algal cells present in a water sample as the absorption of light decreases? 14. What element from the Silver Lake condominiums' sewage output contributes to the increased algal population? Thought Questions 15. A "dead zone" forms where the Mississippi River empties into the Gulf of Mexico due to nutrient runoff into the river that is carried to the Gulf. Explain how the dead zone forms and what impact it may have on humans. 16. Pollutants often affect the producers in an ecosystem first and then have far-ranging effects. Use acid rain and a food chain to illustrate your understanding of the impact pollutants have after they enter an ecosystemm 17. Describe how the cultural eutrophication case study illustrates the need to have a balance of population sizes in an ecosystem. Laboratory 19 Effects of Pollution on Ecosystems 271Explanation / Answer
1)
The end result is acid rain and the following reactions will take place when the sulfur dioxide and nitrogen oxide produced by burning fossil fuels react with the atmospheric moisture.
SO2 + H2O --> H2SO4 ( Sulfuric acid)
NO2 + H2O --> HNO3 (Nitric acid)
2)
It cause thermal pollution. At higher temperature some toxic pollutants are more toxic.
3)
The solubility of dissolved oxygen decrease with the increase of temperature.
4)
when there is runoff from agriculture field to the water body, there is an increase concentration of fertilizers and soil occurs in the water body.
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