SCI 256 final exam all correct answers
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<strong>SCI</strong> <strong>256</strong> <strong>final</strong> <strong>exam</strong> <strong>all</strong> <strong>correct</strong> <strong>answers</strong><br />
http://homeworktimes.com/downloads/sci-<strong>256</strong>-<strong>final</strong>-<strong>exam</strong>-<strong>correct</strong>-<strong>answers</strong>/<br />
1.According to the Environmental Science text, overuse of local resources had little or no<br />
long-lasting effect:<br />
2.Like the Scientific Method, the process of making decisions can be presented as a series<br />
of steps. List these steps, as enumerated in this course.<br />
3.You weigh flour on a scale to find out how much you need for baking cookies because<br />
your recipe c<strong>all</strong>s for exactly 105.00 grams (otherwise your cookies will be like bricks).<br />
Yesterday the scale fell from the counter onto the floor and is now off by 10.25 grams.<br />
Did you get a precise or an accurate measurement? Justify your answer.<br />
4.The lessons of Amboseli National Park teach us that:<br />
I. Overgrazing by domestic livestock can have devastating impacts on native<br />
ecosystems.<br />
II. East African ecosystems are especi<strong>all</strong>y vulnerable to environmental change,<br />
especi<strong>all</strong>y periodic drought.<br />
III. Continued wet-dry cycles change soils, the distribution of plants, and the abundance<br />
of animals.<br />
5.Consider a situation where increased solar radiation reaches the Earth’s surface and raises<br />
the ocean temperature. This results in more evaporation, which produces more clouds.<br />
The increased cloud cover reduces the amount of solar radiation that reaches the surface<br />
of the Earth. This is an <strong>exam</strong>ple of:<br />
6.Human population growth during the pre-industrial agricultural period and during the<br />
Industrial Revolution period occurred with little change in:
7.The crude growth rate is defined as:<br />
8.The nitrogen cycle is one of the most important biogeochemical cycles. However,<br />
molecular nitrogen (N 2 ) in the atmosphere is not a significant element for life because:<br />
9.The case study of Lake Washington in the Environmental Science text illustrates how<br />
phosphorous in the effluent of sewage treatment plants caused an unnatural growth of<br />
algae in the lake. Before the unnatural algae growth, phosphorous was the __________ in<br />
the growth of the algae<br />
10.Which population is most likely to exhibit an evolutionary response to a change in its<br />
environment?<br />
11.A set of interacting species that live in the same area is c<strong>all</strong>ed a(n):<br />
12.Matter and energy are both always conserved, both in physical systems and biological<br />
systems. This principle is stated in the:<br />
13.Change in the amount of biomass is c<strong>all</strong>ed:<br />
14.Which of the following refers to lack of a specific chemical component of food:<br />
15.Describe the characteristics of land considered to be marginal for agriculture.
16.When a pest develops resistance to a chemical, <strong>all</strong> of the following are true except:<br />
17.In the 1930s, soil erosion became a major issue in the United States. Large areas of the<br />
American Midwest became the so-c<strong>all</strong>ed Dust Bowl. Explain how this happened.<br />
18.Forests differ from many other natural resources in that:<br />
19.Forests have been managed more successfully than fisheries mainly because:<br />
20.With the recent introduction of off-road vehicles to the Sahara desert, the Sahara goat has<br />
been subjected to an increase in hunting by Bedouins. Studies indicate that as the total<br />
population size is decreased by the hunting, the percentage of females that are pregnant is<br />
increasing. This is an <strong>exam</strong>ple of:<br />
21.What are the major advantages of wild game ranching, compared with traditional goat,<br />
sheep, and cattle ranching?<br />
22.Can a heat engine convert <strong>all</strong> of the energy input into work? Why or why not?<br />
23.Which energy transformation occurs as a book f<strong>all</strong>s from the top of your book shelf<br />
towards the floor?<br />
24.According to the Environmental Science text, the estimated peak oil production will<br />
about 50 billion bbl per year and it will arrive sometime between 2020 and 2050. In 2004<br />
the growth rate for oil was 3.4% . What will happen when the peak production occurs and<br />
demand is not met?
25.Why is combustion of natural gas cleaner than burning oil?<br />
26.Passive solar is one general class of solar energy systems. Name three other solar<br />
systems<br />
27.“Biodiesel” is a biofuel sometimes used to power cars and trucks. One potential source<br />
of biodiesel is:<br />
28.What are the two nuclear processes that can be used to release energy? Define each one.<br />
29.Name the important steps in the nuclear fuel cycle.<br />
30.Which of the following is a serious groundwater overdraft problem:<br />
31.The total runoff of the world’s rivers is 48,000 km 3 of fresh water each year. Human use<br />
of water is about 4,000 km 3 , or about 8% of the total. How can anyone say there is a<br />
water shortage on Earth?<br />
32.According to the Environmental Science text, what is the most critical water pollution<br />
problem in the world?<br />
33.A specific location where pollution is introduced into surface water or groundwater:<br />
34.A carbon sequestration project is underway in Norway beneath the North Sea. Explain<br />
the purpose of this project.
35.Which of the following is a plausible argument that burning fossil fuels may not lead to<br />
severe global warming:<br />
36.Which of the following was an important factor in producing air pollution during the<br />
2008 Summer Olympics in Beijing, China?<br />
37.Which of the following is the least significant air pollutant (either primary or secondary)<br />
associated with driving cars and other vehicles?<br />
38.Black lung disease is associated with long-term exposure to:<br />
39.In a large office building, a number of employees begin complaining of headaches,<br />
dizziness, and nausea at about the same time. What is this condition c<strong>all</strong>ed? List some<br />
possible causes for the symptoms.