Geology Essay Example For Students

Geology Essay The energy released from earthquakes and forces that move crustal plates are derived from the internal heat engine. Liquid water can exist on earth because the orbit is at the proper distance from the sun. The ozone layer is important to life on earth because it shields living things from uv rays. Constant change and state of flux on earth is caused by slow moving convection currents in the mantle. The internal heat of earth is a result of heat from radioactive decay of certain elements. The main cause of over-use of minerals is expanding populations. Earth is able to hold life because it has sufficient mass to generate gravity to hold gases. The winds, ocean currents and hydrologic cycle from solar energy and the external heat engine. Greatest loss of life comes from landslides and mud flows. Theory of plate tectonics is a revolution because it shows the planet undergoing constant change. Crust, upper mantle, asthenosphere, mantle, outer core, inner core. These potentially harmful trace elements include cadmium, cobalt, copper, lead, iron, Groundwater may also be polluted by mining operations when waste comes into contact with slow-moving subsurface waters. Surface-water infiltration or groundwater movement through mining waste piles causes leaching of sulfide materials that may pollute groundwater. The polluted groundwater may eventually seep into streams to pollute surface water. Groundwater problems are particularly troublesome because reclamation of polluted groundwater is An example of an area where trace elements have affected a large part of the population is in Japan. An increased amount of cadmium was released into the Zintsu River Basin near the end of World War I. At this time the Japanese industrial complex was damaged and good industrial-waste disposal practices were largely ignored. Mining operations for cadmium dumped mining wastes into rivers. The cadmium influx occurred in estuarine waters and in sediments after the intake of industrial wastes. Farmers then used this contaminated water downstream for domestic and agricultural purposes. This intake of cadmium by human beings caused a chronic disease within the Japanese population known as Itai-Itai. The name Itai-Itai suits the disease because it is Japanese for ouch-ouch. Itai-Itai is painful and crippling. It attacks the bones causing them to become so thin and brittle that they break Many solutions and experiments have been tried to find reason and absolution of cadmium influx, but none has given us a perfect resolution of the cause. Such experiments as studying the bones and tissue of victims were quite revealing. The bones and tissue were found to contain large concentrations of zinc, lead, and cadmium. The study of rats showed scientists interesting results. When rats were fed 100ppm of cadmium they lost about 3 percent of their total bone tissue. Rats fed amounts of cadmium plus other trace elements such as lead copper and zinc lost about 33 percent of their total bone tissue. Cadmium in seafood is another problem in Japan so scientists were not surprised when they found out that cadmium has deleterious effects on most, if not all, marine species tested. Histopathological effects of cadmium have been studied in two species of marine finfish. However, no scientist has reported histopathological effects in any invertebrates. Invertebrates are more sensitive to the metal than are finfish. There are few reports on the rates of accumulation of cadmium in marine species, and the only investigations we are aware of are studies on the flux of cadmium through mussels, shrimp, and euphausids. This lack of information caused us to undertake the present study to : (1) determine rates of accumulation and localization of cadmium in tissues of shrimp; (2) describe the histological effects of cadmium in shrimp; and (3) compare the accumulation of cadmium in shrimp from meta incorporated in food with that of cadmium administered directly in water. .ud8fe820a8628d1e70895ca63235e7871 , .ud8fe820a8628d1e70895ca63235e7871 .postImageUrl , .ud8fe820a8628d1e70895ca63235e7871 .centered-text-area { min-height: 80px; position: relative; } .ud8fe820a8628d1e70895ca63235e7871 , .ud8fe820a8628d1e70895ca63235e7871:hover , .ud8fe820a8628d1e70895ca63235e7871:visited , .ud8fe820a8628d1e70895ca63235e7871:active { border:0!important; } .ud8fe820a8628d1e70895ca63235e7871 .clearfix:after { content: ""; display: table; clear: both; } .ud8fe820a8628d1e70895ca63235e7871 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .ud8fe820a8628d1e70895ca63235e7871:active , .ud8fe820a8628d1e70895ca63235e7871:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .ud8fe820a8628d1e70895ca63235e7871 .centered-text-area { width: 100%; position: relative ; } .ud8fe820a8628d1e70895ca63235e7871 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .ud8fe820a8628d1e70895ca63235e7871 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .ud8fe820a8628d1e70895ca63235e7871 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .ud8fe820a8628d1e70895ca63235e7871:hover .ctaButton { background-color: #34495E!important; } .ud8fe820a8628d1e70895ca63235e7871 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .ud8fe820a8628d1e70895ca63235e7871 .ud8fe820a8628d1e70895ca63235e7871-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .ud8fe820a8628d1e70895ca63235e7871:after { content: ""; display: block; clear: both; } READ: The Right To Be Free Persuasive Essay Measurement of heavy-metal concentrations in Japans Zintsu River Basin showed that although the water samples generally contained less than 1 ppm cadmium and 50 ppm zinc, these metals are selectively concentrated in the sediment and even more highly concentrated in plants. One set of data for five samples shows an average of 6 ppm cadmium in polluted soils. In plant roots, this average increased to 1250, and in the harvested rice it was 125 ppm. As of late scientists have been putting their energy and time into research more than activating ways to quickly and efficiently solve the problem. Some structures like specially constructed ponds have been made to collect polluted run off from mines have been made and do help, but they cannot be expected to eliminate all problems. Groundwater problems are particularly troublesome because reclamation of polluted groundwater is very difficult and expensive. So, until scientists have fully researched the effect of trace elements in our geologic planet our society will just have to look towards the future. Bibliography: .