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Environmental exam 3
| Question | Answer |
|---|---|
| What are the three most common GMO crops? | soybeans, corn, and cotton |
| Why are fertilizers used and what problems do they cause? | They replace nutrients to the soil that were stripped by growing crops. The problem caused by fertilizer is it increases the nutrients in waterway leading to more aquatic growth |
| Persistent pesticides | long-lasting, they accumulate in the soil and in non-target organisms |
| Non-persistent pesticides | short-lived/break down quickly, do not accumulate in the environment |
| Three pest control methods that do not use pesticides | using natural predators, resistant crops, ployculture |
| Why are pesticides used in mechanized agriculture? | - increases yield, pesticides kill pests that would've destroyed a crop -increased income, reduces amount of tilling and amount of yield |
| Point source | comes from a single, easy to locate source |
| Nonpoint source | hard to locate, diffused pollutant, may be from multiple sources |
| Withdrawal of water | the amount of water taken from a source, may be returned after use |
| Consumption of water | not returned to its source |
| How are industrial wastes disposed of and how has this changed in the past 25yrs? | - through municipal sewage treatment - since 1972 water must be treated/cleaned before being returned to its source |
| Three major water services provided by metropolitan areas | provide a water supply, wastewater collection/treatment, and stormwater collection/management |
| Hydrologic cycle | the sun causes water to evaporate form Earth's surface, the water condenses in the atmosphere and falls to Earth as precipitation, then soaks into the soil or runs-off into waterways |
| Primary air pollutants | carbon monoxide, volatile organic compounds, particulate matter, sulfur dioxide, and oxides of nitrogen |
| Two primary gases in the atmosphere | nitrogen (78.1%) and oxygen (20.9%) |
| Why do buildings have poor air quality? | lack of circulation, lead in paint, volatile organic compounds from cleaning products, carbon monoxide from cooking, and mold |
| Air pollutant sources | vehicle engines, dust, burning of fossil fuels |
| Air pollutant effects | lung damage |
| Lead industrial sources | metal smelters, battery manufacturers, and lead paint |
| Effects of acid rain | - kills forests, changes in soil composition so it cannot support plant life - organisms cannot reproduce and some organisms cannot form exoskeletons because of the lower pH |
Created by:
ila2309
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