Background information: 1) What is diffusion? Movement of a particular type of molecule from an area of high concentration to an area of low concentration. 2) How is diffusion used by living cells? Living cells bring in food‚ water and oxygen‚ and excrete wastes through the process of diffusion 3) List two body systems in vertebrates that are dependent on diffusion Digestive system and respirational system 4) What is meant by the term metabolism the chemical processes that occur within a
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Surface Tension of Liquids Karen Mae L. Fernan Department of Chemistry‚ Xavier University-Ateneo de Cagayan‚ Philippines Date performed: Nov. 22‚ 2012 ∙ Date Submitted: January 16‚ 2013 E-mail: fernankarenmae26@yahoo.com ------------------------------------------------------------------------------------------------------------------------------- Abstract Surface tension is defined as the energy or work required to increase the surface area of a liquid due to intermolecular forces
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Abstract: This lab tests how temperature and pH affect how enzymes will function. The lab showed that temperature will denature an enzyme when past its optimal working temperature and won’t denature in cold temperatures‚ but have slowed molecular activity. pH will also have an affect on an enzymes efficiency‚ when out of optimal pH the enzyme will not function as it is supposed to and if to far out of the optimal pH the enzyme will change shape and no longer work. Enzymes also showed to be reusable
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A potato will be the substance used to determine how different temperatures affect this enzyme. This experiment has a control‚ independent‚ and dependent variable. The control variable is the size of the filter paper‚ the amount of potato in the experiment‚ and the amount of hydrogen peroxide used. The independent variable is the
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reaction than the other test tube. Which simply contained 10 mL of 3% hydrogen peroxide. The factor that affected the reaction rate was that the manganese was seen as a catalyst. The reason collision theory relates to this experiment is due to the fact that the catalyst creates a higher activation energy and this causes more collisions‚ which increases the reaction rate. In the second experiment‚ the Alka Seltzer tablet was
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Introduction: The process of respiration happens in many organisms and species. For the lab study that we are going to conduct I choose Yeast as my organism. First off Yeast is a microscopic fungus consisting of single oval cells that reproduce by budding or fission (is the splitting of an atom)‚ and capable of converting sugar into alcohol and carbon dioxide. When making your own bread‚ you can buy yeast in the grocery store. The yeast contains little brown grains that will carry out cellular respiration
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1 281 EDVO-Kit # Storage: Principles & Practice of Diffusion & Osmosis Store entire experiment at room temperature. EXPERIMENT OBJECTIVE The objective of this experiment is to develop an understanding of the molecular basis of diffusion and osmosis and its physiological importance. Students will analyze how solute size and concentration affect diffusion across semi-permeable membranes and how these processes affect water potential. Students will also calculate water potential of plant
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Factors that affect exchange rates. Like any price‚ the exchange rate deviates from the cost basis - the purchasing power of currencies – under the influence of supply and demand of currency. The ratio of the supply and demand depends on several factors. It reflects connections with other economic categories - cost‚ price‚ money‚ interest‚ balance of payments‚ etc. There is a complex of interweaving and nomination of decisive factors. Among them are the following. • 1.The rate of inflation. The
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Background……………………………………………………………………2 1.2 Definition of interest rates……………………………………………………..2 2.0 How does an increase interest rate affect the economy in the UK? 3.1 Encourage people saving money and reduce borrowing……………2-3 3.2 Decrease firms to investment……………………………………………..3 3.3 Promoting the exchange rate‚ and makes exports less………………...3 3.4 Reduce the aggregate demand and inflation rate………………………4 3.5 The price and cost will fall………………………………………………
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Osmosis is the spontaneous net movement of solvent molecules through a partially permeable membrane into a region of higher solute concentration‚ in the direction that tends to equalize the solute concentrations on the two sides. It may also be used to describe a physical process in which any solvent moves‚ without input of energy‚ across a semipermeable membrane separating two solutions of different concentrations. Although osmosis does not require input of energy‚ it does use kinetic energy and
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