even though the poet and his mother are having a good time peeling potatoes‚ his mother is ill and they are brought to their senses that the happy times will soon be brought to an end. 2. The potato is an important symbol in Ireland because of its value as a food staple and reminder of the terrible potato famine in the 19th century. What personal symbolic value does it have in this poem? In this poem the potatoe is a symbol of time shared with the poets mother‚ time when it is just him and his
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Introduction In chemistry‚ substances require a certain amount of energy in the form of average kinetic energy (temperature) to freeze. To reach the temperature a substance requires to freeze‚ it must lose a certain amount of heat energy (a form of energy transferred from one object to another‚ because of a temperature difference). When a substance reaches its freezing point and begins to freeze‚ its temperature remains constant until it is completely frozen. However‚ in order to melt a substance
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Objective: To investigates the enzymatic effect of various materials in the hydrogen peroxide solution. Apparatus & Equipment: Beaker Test tubes Either: water bath (95oC) or Bunsen burner Materials: Fresh Liver Potato cubes Manganese dioxide Hydrogen peroxide** Wood splints **Caution: Hydrogen peroxide is formed continuously as a by-product of chemical reactions in living cells; it is a very toxic (poisonous) substance. [Note: using boiling tubes may provide
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Introduction: In this experiment I aim to investigate the effect of the surface area to volume ratio on the rate evaporation of water in different sized containers. By measuring the time it takes for the whole amount of water to evaporate‚ a conclusion can be made about the validity of the surface to volume ratio in regards to the biological process of diffusion. Research Question: What is the effect of the surface area to volume ratio on the evaporation of water? Variables: - Independent:
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transport are endocytosis‚ exocytosis‚ and phagocytosis. Passive transport does not require energy it is powered by the concentration gradient of the molecule. Examples of passive transport are diffusion‚ facilitated diffusion‚ filtration‚ and osmosis. In our Osmosis Lab I used a Grade a large egg from the grocery store. Its circumference is 5 ½ inches it is smooth with no cracks. I carefully place the egg in a clear plastic cup and fill the cup with vinegar. I immediately notice bubbles covering the
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Osmosis Investigation We are trying to find out what the concentration of the solutions is inside the vacuole of a potato cell. We will investigate how the mass of the potato chips change in different sucrose solution concentrations. We will use osmosis to do this. I will be measuring and controlling many different variables‚ these include; - The dependent Variable Weight of potato chip Independent Variable Concentration of sucrose Control Variables consist of; - 1. Temperature
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Aim: What is the effect of changes in sucrose concentrations on the water potential of potato cells? Raw Data: Suscrose concentration (0.00M) Group 1 Group 2 Group 3 Group 4 Change in mass (g) (+/-0.1g) 0.04 0.19 0.10 -0.27 Change in length (mm) (+/- 0.1mm) 0.00 0.00 0.00 0.30 Suscrose concentration (0.10M) Group 1 Group 2 Group 3 Group 4 Change in mass (g) (+/-0.1g) 0.29 0.44 0.22 0.08 Change in length (mm) (+/- 0.1mm) 1.10 0.30 0.30 0.70
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Potato Enzyme Lab Enzymes are protein catalysts that speed up chemical reaction in living organisms. The purpose of this lab was to; observe the breakdown of hydrogen peroxide toxin by potato’s enzyme catalase‚ determine factors that influence how quickly the reaction takes place‚ and determine factors that influence how well enzymes function. The first test‚ we were supposed to see what would happen when we add sand in hydrogen peroxide. We filled a test tube with 5mL hydrogen peroxide and we added
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Practical Work Nº2: “Different methods to control osmosis” Aim: observe and test the process of osmosis through different kinds of methods: the weigh (potato)‚ the density (beetroot) and under the light microscope (onion). Hypothesis: according to the encyclopedia definition osmosis is the diffusion of a liquid (most often assumed to be water‚ but it can be any liquid solvent) through a partially-permeable membrane from a region of high solvent potential to a region of low solvent potential. Thus
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HISTORICAL INVESTIGATION To what extent did Gorbachev’s reform movement lead to the fall of the Berlin wall in East Germany? Anupriy Kanti Candidate Number – 001425-027 Dhirubhai Ambani International School Word count: 1913 Anupriy Kanti Candidate Number – 001425‐027 IB Historical Investigation Page Contents A. Planning of the Investigation .......................................................................................................
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