Reference no: EM132112273

RESPOND IN 100 WORDS TO EACH STUDENT.

Tanya's response to Unit I Discussion Board Question

The factors I take into consideration when choosing between my wants to satisfy me heavily relies on rational self-interest. I look at how it will affect me both positively and negativity, what the cost to me will be, what other wants will I need to trade for it, and how will it affect those around me.

I agree with Albert Einstein's quote," Sometimes one pays the most for things one gets for nothing," because it is of value to me to pay someone to gather the information I need to make the right choice for me. I would rather hire "experts" to give me the information I need instead of spending a lot of time trying to find it on my own for free. To me, getting things done faster by someone is is an expert without using a lot of my time is worth the exchange of money for time.

Dorian Cozart

RE: Unit I Discussion Board Question

Before I buy something that I really want I would have to say i weigh the marginal benefit before I make a decision. I ask myself will this satisfy me and is it worth what I will spend for it? Also I am very economically conservative so I tend to use rational self interest when I go to purchase an item.

I try to get a better bang for my buck and will and deal salesmen. I agree with Albert because when you get something for nothing or are given something by an individual, you feel indebted to them forever and will probably ended up paying them back more or over compensating for what they did for you.

Justin's Reply to Unit I Discussion Board Question

Hello everyone, I currently live in New Mexico. There is a rich history of mining here to include coal, oil, natural gas, and uranium. For the purpose of this discussion board I will focus on the mining of uranium. There are two methods of extracting uranium: conventional open-pit or underground mining, or a chemical process of In-Situ-Leaching (ISL).

Depending on the depth in the ground of the seam of rock containing uranium, the deposit is either mined using surface or sub-surface mining. Obviously, uranium mining has some pretty serious risks to include radiation-related health issues especially lung cancer. The environmental impact of mining uranium is surprisingly little to none as long there is a natural level of uranium. However, there is an issue once large amounts of uranium is mined.

Bryce Pacheco RE: Unit I Discussion Board Question

Hello Class, My name is Bryce Pacheco. I currently live in Arizona. I am active duty Air Force stationed at Luke AFB. Arizona. Most all the western states carry a long history of mining. The main minerals mined are copper, molybdenum, construction sand and gravel, portland cement, crushed stone, lime, and of course silver and gold. They contribute a significant amount of jobs and money to Arizona's economy. Mainly due to the rich mineral deposits here and usually the feasibility and accessibility of reaching these minerals are fairly easy compared to mining in other states.

Arizona lead the United States in copper production by a large margin. Arizona produced 62% of all copper mined in the United States. The main process of mining these minerals is open pit mining. Open pit mining is the safest and most efficient way to mine any material. In my opinion open pit mining is the most preferred type of mining especially here in Arizona where there is not much living or growing in the deserts.

The benefits are vast, but the one that stands out to me the most is the ability to put back the left over material back to make it look like nothing ever happened there. If we want to continue the American way of life we need to continue to look for mineral deposits and continue to develop new technologies to get it. The benefits of mining copper most definitely outweigh the safety and environmental concerns of mining the mineral out of the ground.

UNIT I

QUESTION 10

Describe the characteristics a substance must possess in order to qualify as a mineral.

QUESTION 11

How is a scientific hypothesis different from a scientific theory? How does a scientific theory differ from a regular theory (i.e., a non-scientific theory in the way the term is used by lay people)?

QUESTION 12

List and describe the different characteristics of sedimentary rocks and discuss the processes that change sediment into sedimentary rock.

QUESTION 13

Imagine that you are a mineralogist and you have just received a single, small sample of a mineral with which you are not familiar. Discuss how you might go about identifying that mineral using some of the mineral identification properties discussed in Chapter 1. Which properties would you find less useful? Why?

Your response should be at least 200 words each in length.

UNIT II

QUESTION 8

Briefly describe at least six depositional features created by glaciers.

QUESTION 9

Why are flash floods common in arid climates?

QUESTION 10

Discuss the three different paths that water could take once it falls in the form of precipitation.

QUESTION 11

Why is wind erosion more effective in deserts than in more humid regions?

QUESTION 12

When examining the geology of a region for potential useable aquifers, what characteristics, or factors would you consider? Discuss at least three environmental concerns related to groundwater.

Your response should be at least 200 words each in length.

UNIT III

QUESTION 9

Briefly describe what happens at a subduction zone

QUESTION 10

Explain why Africa and South America are moving apart.

QUESTION 11

Explain how an accretionary wedge forms.

QUESTION 12

What evidence did Alfred Wegener use to support his hypothesis of continental drift? What additional evidence was added later (post-World War II) as oceanographers began to explore the ocean floor? How do these two ideas unite to form the theory of plate tectonics?

Your response should be at least 200 words each in length.