What are the consequences of cutting down trees? There are many consequences for the environment of cutting down trees. Known as deforestation it has huge effects on the environment. It one very big effect is the loss of biodiversity which is a direct effect of cutting down trees. There are many reasons of which humans act out deforestation. For example is so that we can set up cattle farms. Also grow crops of which can then be sold to people. Another reason is for urbanisation and for the building
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CALCULATIONS INTRODUCTION The first part of this ‘Chemical Calculations’ topic will help us to work out QUANTITIES involved in a reaction; For example‚ a manufacturer might want to know‚ How much ammonia will I produce from 20 tonnes of nitrogen in the Haber Process? To do these calculations you will need to be familiar with the term Ar (relative atomic mass)‚ Mr‚ Molar mass and Mole. Relative Atomic Mass – Ar • The Ar tells us the average mass of an individual atom (average because
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process was one of the competing industrial processes in the beginning of nitrogen based fertilizer production. It was developed by Norwegian industrialist and scientist Kristian Birkeland along with his business partner Sam Eyde in 1903‚ based on a method used by Henry Cavendish in 1784.[11] This process was used to fix atmospheric nitrogen (N2) into nitric acid (HNO3)‚ one of several chemical processes generally referred to as nitrogen fixation. The resultant nitric acid was then used as a source of nitrate (NO3-)
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much needed by vegetation‚ namely Nitrogen and phosphorous. The Nitrogen in the fertiliser is in the form of ammonia or ammonium‚ these are converted by nitrifying bacteria into nitrites‚ and then a different kind of nitrifying bacteria converts the nitrites into nitrates. The nitrates are taken up into the plant through the roots where they are assimilated into amino acids which are used for protein and DNA synthesis. Naturally the plants die returning the Nitrogen to the soil as nitrates‚ proteins
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mostly caused by human emissions of sulfur and nitrogen compounds which react in the atmosphere to produce acids. In recent years‚ many governments have introduced laws to reduce these emissions. Emissions from volcanoes and those from biological processes that occur on the land‚ in wetlands‚ and in the oceans account for the contribution of the pricipal natural phenomena of acid-producing. However‚ the principal cause of acid rain is sulfur and nitrogen compounds from human sources‚ such as electricity
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Algal Research 2 (2013) 445–454 Contents lists available at ScienceDirect Algal Research journal homepage: www.elsevier.com/locate/algal Process development for hydrothermal liquefaction of algae feedstocks in a continuous-flow reactor Douglas C. Elliott ⁎‚ Todd R. Hart‚ Andrew J. Schmidt‚ Gary G. Neuenschwander‚ Leslie J. Rotness‚ Mariefel V. Olarte‚ Alan H. Zacher‚ Karl O. Albrecht‚ Richard T. Hallen‚ Johnathan E. Holladay Pacific Northwest National Laboratory‚ P.O. Box 999‚ MSIN P8-60
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planet Earth that is retained by Earth’s gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation. A. Nitrogen - 78% - Dilutes oxygen and prevents rapid burning at the earth’s surface. Living things need it to make proteins. Nitrogen cannot be used directly from the air. The Nitrogen Cycle is nature’s way of supplying the needed nitrogen for living things. B. Oxygen - 21% - Used by all living things. Essential for respiration. It is necessary for combustion or burning
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Micro-organisms Micro-organisms Micro-organisms (or microbes) are literally microscopic organisms‚ which can only be seen properly with the aid of a microscope. These include bacteria‚ microscopic fungi (moulds) and protoctists. Although viruses‚ which are even smaller than bacteria‚ are generally considered to be non- living entities‚ they might also be included here as they are important disease-causing agents. Micro-organisms are the most numerous organisms in any ecosystem. There are about 159
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Ecology EQ’s 2. Abiotic and biotic components influence each other. For instance‚ temperature (abiotic factor) can make plants (biotic factor) reproduce more or reproduce less. Also water‚ an abiotic factor‚ has an effect on how animals‚ a biotic factor‚ survive in certain areas of the world. 3. Because a different niche allows multiple species of organisms to coexist. If all organisms had the same niche‚ then there would be heavy competition for food‚ shelter‚ etc. Having different niches gives
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ion and Helium atom have the same: * number of protons * number of electrons * number of neutrons * valency iv) The number of neutrons in Protium is: * zero * 1 * 2 * 3 v) The element having the symbol ‘Ga’ belongs to this family: * Carbon * Nitrogen * Boron * Beryllium vi) On burning in excess of Oxygen‚ Sodium forms its: * superoxide * peroxide * monoxide * dioxide vii) A mixture of Aluminium nitrate and Aluminium powder is called: * Duralumin * Ammonal * Carnallite * Alum viii) Ca2B6O11
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