Get Full Essay Get access to this section to get all help you need with your essay and educational issues. Earth Science- Classzones Essay Sample Classzone Assignment 1 Looking at the image, what are the major parts of our planet that can interact as a system?
Note that ammonia is much more than the product with which it is most readily associated: In fact, ammonia is an extremely abundant substance, occurring naturally, for instance, in the atmospheres of Venus and other planets in our solar system.
The importance of ammonia is reflected by the fact that it and water are the only two substances that chemists regularly refer to by their common names, as opposed to a scientific name such as carbon dioxide.
As for ammonium, its extra hydrogen atom makes it a substance that dissolves in water and is attracted to negatively charged surfaces of clays and organic matter in soil. Therefore, it tends to become stuck in one place rather than to move around, as Earth science atmosphere essay essay does. Plants in acidic soils typically receive their nitrogen from ammonium, but in nonacidic soils, nitrate is typically the more useful form of fertilizer.
The two fertilizers are also combined to form ammonium nitrate, which is powerful both as a fertilizer and as an explosive. Ammonium nitrate was used both in the first World Trade Center bombing, inand in the even more devastating Oklahoma City bombing two years later.
In just a few months, once-productive farmland turned into worthless fields of stubble and dust, good for virtually nothing. By the time it was over, the region had acquired a bitter nickname: Farmers happily reaped abundant yields, year after year, not knowing that they were actually preparing the way for soil erosion on a grand scale.
Farmers in the s had long known about the principle of crop rotation as a means of giving the soil a rest and restoring its nutrients.
But to be successful, crop rotation must include fallow years i. Cotton and wheat are examples of crops that deplete nutrient content in the soil, and in fact wheat was the crop of choice in the future dust bowl. In some places, farmers alternated between wheat cultivation and livestock grazing on the same plot of land.
The hooves of the cattle further damaged the soil, already weakened by raising wheat. The land was ready to become the site of a full-fledged natural disaster, and in the depths of the Great Depression, that disaster came in the form of high winds.
These winds scattered vast quantities of soil from the Great Plains of the Midwest to the Atlantic seaboard, and acreage that once had rippled with wheat turned into desert-like wastelands. The farmlands of the plains states have long since recovered from the dust bowl, and farming practices have changed considerably.
Instead of alternating one year of wheat with a year of grazing livestock, farmers in the dust bowl region apply a three-year cycle of wheat, sorghum, and fallow land. They also have planted trees to serve as barriers against wind.
Years after the dust bowl, the American West could have again become the site of another disaster, had not farmers and agricultural officials learned from the mistakes of an earlier generation. During the s, American farms enjoyed such a great surplus that farmers increasingly began to sell their crops to the Soviet Union, and farmers were encouraged to cultivate even marginal croplands to increase profits.
This alarmed environmental activists, who called attention to the flow of nutrients from croplands into water resources.
NALANDA OPEN UNIVERSITY M.A./monstermanfilm.com (Environmental Studies) PART–I, PAPER–I (Fundamentals of Environmental Science & Ecology) Annual Examination, Winner of the Book Award in Science, Phi Beta Kappa A fascinating book The catastrophic surface narrative of this impressive and intriguing book would surely have pleased Stephen Jay Gould; but I think its deterministic subtext would have pleased Charles Darwin still more. The case for thinking the Earth unusual was made with influential vigour by Donald Brownlee, an astronomer, and Peter Ward, a palaeontologist, in “Rare Earth”, a book published in
As a result of public concerns over these and related issues, Congress in passed the Soil and Water Resource Conservation Act, mandating measures to conserve or protect soil, water, and other resources on private farmlands and other properties.Earth science The earth’s crust is the thin layer of rock which makes up to one percent of the whole planet and can range between 1 kilometer and 80 kilometer in different (Alden, ).
The crust is made of two important types of rocks namely the basaltic (underlying the floor of the sea) and the granitic (the major components of the continent). click here Energy and Human Evolution by David Price. Please address correspondence to Dr. Price, Carpenter Hall, Cornell University, Ithaca, NY The destructive potential of any natural hazard is estimated basically by its spatial extent and severity.
Spatial extent upto which the effect of a disastrous event could be felt may easily be classified into small, medium and large scales. Essay No. Pollution. The word pollution has been derived from the Latin word pollution, which means to make dirty.
Pollution is the process of making the environment land water and air dirty by adding harmful substances to it. Atmosphere Homework Describe the composition of the air Air is a mixture of gases and aerosols that compose the atmosphere surrounding Earth.
The primary gases of air include nitrogen (78%) and oxygen (21%). About the Contest. AGI is sponsoring an essay contest to celebrate Earth Science Week The essay theme for this year is: "Finding ‘Art’ in Earth"Please see below for contest guidelines.