The affect of temperature on the rate of movement of woodlice Aim: The aim of this experiment is to establish whether a change in temperature affects the rate in which woodlouse move. I measured the rate by timing the woodlouse to move a set distance of 20cm‚ and altered the surrounding temperature by submerging a clear tube in water with different temperatures controlled by a water bath. Research: It is to be believed there over 3000 different species of woodlice‚ a total of 42 species
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of molecular weight on the rate of diffusion was measured using two tests namely: the glass tube test and the agar-water test. The set-up of the glass tube test used two cotton balls of the same size. One cotton ball is moistened with hydrochloric acid (HCl) and the other one is moistened with ammonium hydroxide (NH4OH). The two cotton balls were inserted in both ends of the glass tube. NH4OH which has a lighter molecular weight (35.0459 g/mole) diffused with a faster rate (dave=20.25cm) as compared
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The Effect of Molecular Weight on the Diffusion Rate of Substances Jesselyn P. Rodriguez Group 4 Section X-2L August 13‚ 2013 ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ABSTRACT The effect of molecular weight on the rate of diffusion of substances is tested using two tests: the glass tube test and the agar-water gel test. In the glass tube test‚ two cotton balls were soaked
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Mitosis Review 1. So why does cell division occur? Cell division occurs because an organisms such as plants‚ animals and such need to grow on a molecular level in order for them to continue thriving. For example‚ new cells are created with the intention of replacing old cells and tissues‚ with fresh and functioning ones... for most part. In humans and other organisms‚ organ cells‚ muscle cells‚ bone cells and such are constantly replace for growth and prolongation of proper function. Also‚ embryos
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life as we know it on this planet‚ and according to Campbell et al. (1999)‚ water is the major constituent of cells. Reactions vital to life occur under aqueous conditions in the body and cells of all organisms‚ and the concentrations of reactants necessary for these reactions depend upon the amount of water present (Pough et al. 2004). By the process of osmosis‚ water moves from areas of lower to areas higher concentration across a water- permeable membrane‚ like a cell membrane (Nybakken and
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Affects On Nutrition on Babies Kyaw Soe Han Tacoma Community College Lifespan Psychology 200 Professor Brewer 1st May 2015 Nutrition is not only the greatest environmental influence on babies since in the womb and during infancy but also throughout the years of life. Nutrition also plays a role in shaping mental health and physical health. Substantial amount of nutrient is required when the neural plate and neural tube forms. Results that are obtained from animal models testing and some
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communities water to water his bean field. When the people found out that Joe was “stealing” the water they were upset‚ mad‚ and wanted him to stop. This just goes to show that no matter what you do‚ you can’t please everybody. Society affects peoples behaviors in many different ways. This movie takes place in New Mexico during the 1980’s. During this time New Mexico had already established five out of the six types of societies. These societies include: Foraging‚ Pastoral‚ Horticultural‚ Agrarian
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How is the increasing rate of unemployment affecting the youth of South Africa? 1. Introduction A major problem in South Africa is the large number of young persons who are unemployed. In South Africa 50% of the South Africans who don’t have jobs‚ are youngsters. Today‚ a matriculation qualification is not enough to get a job in this country‚ even having a degree does not necessarily guarantee employment. South Africa has an acute problem of youth unemployment that requires a multi-pronged
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to submit an article on new technology (e.g. mobile phone‚ the Internet‚ Facebook) and how it affects young people’s relationships with family and friends. We will publish one article from each country. You should also make some suggestions on how young people can eliminate the negative impact of technology on their relationships. Write your article. Write approximately 220 – 260 words. How does Facebook affects relationships? In today’s advanced technological society‚ it is disputable that the importance
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Osmosis is the diffusion of a solvent across a selectively permeable membrane that occurs in response to differences in solute concentrations (Allen and Harper 2014).Osmosis can fall under the category of passive transport which does not require energy. With osmosis being a type of diffusion it is viewed as molecules moving from a high concentration to a low concentration. To further explain if there is a low water concentration‚ high amounts of solutes will be present. Water will most likely move
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