An Investigation into the Factors which Affect Osmosis Essay -- GCSE B

An Investigation into the Factors which Affect Osmosis Osmosis is defined as the movement of water molecules from a higher concentration to a lower concentration through a partially permable membrane. Osmosis occurs with molecule moving in and out, these molecules move across the plant’s cell membrane. The plant’s cell membrane is partially permable and therefore it has small holes in it which allow for small water molecules to pass through it however larger molecules such as glucose through. However on the out side of the plant cells there is a cell wall of cellulose that has larger holes that let anything pass through it. This cell wall is totally permeable and therefore will allow larger molecules such as glucose through it, but the larger molecules can still not pass the cell membrane. When these cells are in a solution which has a higher concentration of water than the cells concentration of water the water will diffuse into the cell as the water moves from a higher concentration (the solution) to the lower concentration (the cells.) As more and more water enters the cell the cell wall starts to expand and the cell starts to become turgid. Even is a plant cell is placed in a solution where there is a high water concentration and a weak sugar solution (say a 0.1 d/mol3 strong) there will still be more water outside the cell than inside the cell therefore there will still be an increase in volume and weight. This means that when the plant cells are placed in a strong sugar solution (where there is more sugar than water.) there will be a decrease in weight and volume. This process is defined as plasmolysis. This is where the cell membrane pulls away from the cell wall, this is because a lot of water has been moved from the cell as the plant cell has the strong concentration of water and the solution has a weak concentration the water will move from the plant top the water. Sometimes the cell will shrivel up completely and it becomes flaccid. This is represented in the diagram below With osmosis occurring there will eventually be a point where the concentration of water will be equal to the concentration inside the cell. This means that with the water still diffusing in and out there will be equal amounts going in and out. This means that osmosis is still occurring but the plant or the solution is either gaining o... ...ainst the cell wall, the tugor pressure will reach it’s maximum and the cells will not be able to take in any more water. At the other end of the line, I would expect the line to eventually curve off horizontally. Once the cell becomes flaccid and the cell membrane collapses, no more water would be able to escape. I did predict that the stronger the solution the more the potato chips would lose weight. I believe my results have proven this. Evaluation I am pleased with the way my experiment has gone, I did not come across too many problems and most of my points on the graph were close to the line of best fit. Therefore I am happy with the accuracy of my results. I think my method was adequate for producing accurate results I could still improve it. I could’ve also tried to measure the potato chips more accurately when cutting them. I feel my investigation on the whole was a sucsess. I achieved reliable and accurate results. however I could increase my confidence in my conclusions by repeating the experiment with another carrot to back it up. But on the whole my experiment matched my prediction and I am happy about my results and the way I conducted it.

Freshman

This can cause stress and anxiety for some people. Stress often leads to eating more and eating foods that are not as healthy. Also, if students have a hard time adjusting to college life, they may find themselves being unhappy, which could lead to drinking more and eventually gaining weight. Sometimes adjusting is extremely sad and upsetting for college freshman, which often leads to emotional eating. Exercise habits can become worse In college because students are busy and do not always have the time to worry about staying in shape.They can find themselves at class all day, studying all night, and having time to eat, but not workout. Much fewer people are student athletes in college than in high school. In high school, the teams are easier to make because it is much less competitive and more about having fun. In college, sports are intense and only a small amount of people participate in them. Therefore, these high school athletes are not getting as much exercise In college because most of them are not participating In a sport anymore, which can result In weight gain.Another cause for the freshman fifteen is the food being available at all times. College students do not have a specific time for breakfast, lunch, and dinner. The dining halls are open and filled with food all day. Some students cannot handle this and end up eating much more than they should, just because it is there and it is available to them, which they are not used to. Although there are people who will still eat healthy and restrain from overeating, several people do not have that will power and will eat every time they pass by a addling hall.The causes of gaining the Irishman fifteen are common at all colleges and universities, and students need to start eating healthier, working out more, and being conscious of their health. It is clear that the freshman fifteen is a real thing. The problems that cause this weight gain can happen at any school and that is why it is so common. Although not everyone who puts on weight in college puts on exactly fifteen pounds, it is still concerning. College students, of all people, should try to stay healthy. They are developing bad habits that could last for the rest of their lives.

Globalization and the Decline of the Welfare State

The idea that globalization and the welfare states can conflict comes from the fact that: while globalization is based on profit maximization, the welfare states main goal is to reduce, if not eliminate inequality, insecurity and poverty through proper redistribution of wealth mechanisms. The welfare state has to enhance â€Å"people’s adaptability, so that they, whatever their skills, can turn themselves from losers into winners through their own efforts† (Dennis J. Snower. Et al.137). The point of departure is that these two concepts are related to the allocation of resources and any conflict will have to occur on that level. This paper will not analyze the responses of the welfare states to the challenges of the 1970 and 1980s but†¦show more content†¦Placing knowledge and technology as the main carrier of economic growth and productivity can be seen as part of setting the stage for social cohesion and harmony to the economic competitiveness on the national but also international level. Increasing human capital, research and development, technology, as the KBE demands could also translate into a higher demand for the skills, puts a country at the forefront of competition in a particular sector (34). Although welfare regimes differ from one country to another, the assumption is that investing in human capital can make countries competitive and capable of competing on an international level. This view serves as an optimist view of the relationship between globalization and the welfare states. In order for globalization to be sustained, welfare regimes have been able to respond by increasing social expenditures on human capital. This shows that instead of being a conflict of goals, it is a harmonization of goals that go hand in hand. To a large extent, rich countries address social needs through their social expenditures According to the Organization of Economic Cooperation and Development (OECD) states that â€Å"Gross public social ex penditure on average across OECD increased from 16% of GDP in 1980 to 19% in 2007, of which public pensions (7% ofShow MoreRelatedThe Welfare State and Government Responses to Economic Openness1668 Words   |  7 PagesThe Welfare State and Government Responses to Economic Openness I. Introduction Economic openness is the phenomenon in which individual economies from all over the world become increasingly connected and interdependent through greater liberalization of trade and the vast movement of goods, services, and capital across borders. 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