Science in the News: Should old people be allowed to drive?
Environmental Social Economical This is my coursework broken down into digestible chunks. Anything I used came from this piece of text. For (they should be able to drive) > They are experienced in driving. Therefore have more practises driving on the road. [8] > More convenient, you can get where you want, whenever you want. [11] > Not as dangerous in a car, as elderly people may feel intimidated at a bus stop. [12] > It is discrimination to not let them drive. [13] > They have passed there test, so they have as much right to drive than anyone else. [14] > Gives money to the Government for road tax. > Petrol stations gain money. > They can talk with family and friends comfortably without feeling awkward around others. > If more old people drive they will buy new cars, from car dealers. Putting more money into the local economy, adding to the Multiplying effect. > It they drive a car, they will pay money towards having it cleaned, giving money to car cleaners. Against (They shouldn't be able to drive) > Poorer eyesight is very common with older people. [15] > Adds to Global warmer. [16] > Uses fossil fues > Slower reaction time as you get older. [2] and > Saves money as petrol is rising. [17] > It is more sociable to go on a bus and talk with the community. > Could put others in danger. >
The roles water in living organisms and water as a habitat for organisms
The roles water in living organisms and water as a habitat for organisms Introduction Water is the most abundant liquid on the planet. It covers 2/3rds of the earth's surface, and at least 60% of living organisms is water. This value may be as large as 99% - in a jellyfish. The reason for such a large amount of water making up organisms is the fact that it is a major cell constituent - more on that later. Water is a simple molecule yet has many interesting properties which contribute to its importance. Structure The molecule is polar, because the electrons in the bonds between O and H are pulled slightly toward the O. this means that the O atom is slightly negative and the two H atoms are slightly positive (shown by ?+ and ?-). The electrons are shown as small dots; note they are closer to the O. These properties are described more in the solvent section. db. Water is made up of two hydrogen atoms bonded to one oxygen atom. They are covalently bonded and the intramolecular covalent bonds are very strong. The structure is non-linear, due to the electron pair repulsion of the two lone pairs of electrons on the oxygen atom. Major cell constituent Often 2/3rds or more of living cells are water. The water is found mainly in the cytoplasm, and it plays a vital role in many functions of the cell: in all organisms - metabolism, and in plants photosynthesis and support. The
Who's cheating on the vinegar?
Chemistry Course Work - Neutralisation of ethonoic acid Who's cheating on the vinegar? Task: A chip shop owner buys his vinegar from 4 different suppliers A, B, C and Safe way. He suspects that at least one of them waters down the vinegar supplied to them by the manufacturer. You are the analytical chemist assigned to investigate this. You have already planned an experiment that will give you the evidence you need. The following results have been taken from a similar experiment. Your task is to analyse these results and present your conclusion. You must then evaluate the experiment by assessing its success in answering the original question, explaining any anomalous results, and suggesting any possible improvements. Aim: I have been asked to find out if any of the suppliers have been watering down the vinegar they have supplied to the chip shop owner. I will do this by using a technique called Titration. Vinegar is ethonoic acid What is Titration? Titration is a form of neutralisation. This is a process of determining the concentration of a substance in solution. A measured amount of a known solution concentration (molarity) is added to an unknown volume of a second solution in carefully measured amounts until a reaction of definite and known proportion is completed. Neutralisation is when a Hydrogen ion and a Hydroxide ion react together to form water which is
The Use Of Enzymes In Industry
The Use of Enzymes in Industry Skills I and J Enzymes are extremely useful and therefore are used in many industries. The reason for them being so useful is that they work quickly and efficiently to speed up the rate of many different reactions without going through changes themselves; this also makes them reusable.[5]This is all down to them being biological catalysts. The food industry is a major industry which relies on enzymes and probably the main place in this country where they are used. Throughout the industry there are numerous different areas which involve enzymes to make the process quicker. Some of these are; Fruit, Dairy, Brewing, Starch and Baking. Throughout the process of making fruit juices enzymes are used; as fruits contain pectins which are polysaccharides and cause cloudiness in the juices. To reduce this pectin and increase the amount of juice degrading enzymes are added at the pressing stage as the fruits are being modified. Therefore customers get better juice which isn't as cloudy and the company's gain more profit as they are making a larger quantity of juice.[7] Dairy products like cheese are made with the help of two enzymes, pepsin and chymosin. As cheese is made from raw material milk, the milk has to be warmed and these two enzymes added in order for the milk to form 'curbs and whey'. The product of this is a cloudy thick liquid containing
