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Unit 10 Human Interaction and the Environment: Test Review
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Terms in this set (56)
What is a mineral?
Minerals are naturally occurring, inorganic, homogeneous, solid with a crystalline structure.
How are rocks and minerals different?
Rocks are made up of minerals. Minerals are homogeneous, rocks are not.
Name the four main processes by which minerals form.
1. Cooling magma
2. Evaporation
3. Precipitation
4. Heat and Pressure
What is a lode?
A lode is a hot mineral solution that settles into in cracks in rocks.
What is a primary ore and where is it located?
A primary ores is a deep vein and deposit underground - often rich in sulfur.
What is a weather (supergene) ore and where is it located?
Weathered (supergene) ores are ores weathered near the surface. The sulfur has leached out of them - they are cleaner and cheaper to mine and process.
What is overburden and where is it located?
Overburden is the material that lies above an ore area and must be removed prior to surface mining.
Why are mining companies required to reclaim the area where they have mined?
Without reclamation, habitats are permanently destroyed and erosion increases.
What does renewable mean?
Renewable means that the resources is not depleted when used.
Name the renewable energy resources we learned.
Solar power, hydropower, wind power, biomass, geothermal power, water power (tides and waves) are the renewable resources we learned about.
What does nonrenewable mean?
Nonrenewable means that the resource cannot be replaced naturally at the same pace it is being used.
Name the nonrenewable energy resources we learned.
Coal, Petroleum, Natural Gas, and Nuclear Power are the nonrenewable energy resources we learned about.
Name the three fossil fuels.
Coal, Petroleum (crude oil), and natural gas.
Which fossil fuel is formed 300-400 million years ago from land plants.
Coal formed from the dead remains of trees, ferns and other plants that lived 300 to 400 million years ago.
How were the fossil fuels petroleum and natural gas formed?
Oil and natural gas are from organisms that lived in the water and were buried under ocean or river sediments.
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Verified questions
ENGINEERING
The football coach at a midwestern university was given a 5-year employment contract that paid $800,000 the first year, and increased at an 8% uniform rate in each subsequent year. At the end of the first year's football season, the alumni demanded that the coach be fired. The alumni agreed to buy his remaining years on the contract by paying him the equivalent present sum, computed using a 6% interest rate. How much will the coach receive?
ENGINEERING
Use MATLAB to generate eight points from the function $$ f(t)=\sin ^{2} t $$ from t = 0 to 2$\pi$. Fit these data using (a) cubic spline with not-a-knot end conditions, (b) cubic spline with derivative end conditions equal to the exact values calculated with differentiation, and (c) piecewise cubic hermite interpolation. Develop plots of each fit as well as plots of the absolute error ($E_{t}$ = approximation − true) for each.
ENGINEERING
Which of the following is (are) reduction reaction(s)? $$ \begin{array}{l}{\text{ (A) } \mathrm{Fe}^{2+} \longrightarrow \mathrm{Fe}^{3+}+e^{-}} \\ {\text{(B) } \mathrm{Al}^{3+}+3 e^{-} \longrightarrow \mathrm{Al}} \\ {\text{ (C) } \mathrm{H}_{2} \longrightarrow 2 \mathrm{H}^{+}+2 e^{-}} \\ {\text{(D) Both } \mathrm{A} \text { and } \mathrm{C}}\end{array} $$
ENGINEERING
A large, rigid, rectangular billboard is supported by an elastic column. There is concern about the deflection, $\delta$, of the top of the structure during a high wind of velocity V. A wind tunnel test is to be conducted with a 1:15 scale model. Assume the pertinent column variables are its length and cross-sectional dimensions, and the modulus of elasticity of the material used for the column. The only important “wind” variables are the air density and velocity. (a) Determine the model design conditions and the prediction equation for the deflection. (b) If the same structural materials are used for the model and prototype, and the wind tunnel operates under standard atmospheric conditions, what is the required wind tunnel velocity to match an 80 km/hr wind?