0.2M sucrose‚ 0.4M sucrose‚ 0.6M sucrose‚ 0.8M sucrose‚ and 1.0M sucrose‚ scissors‚ string‚ a balance‚ six 250-mL cups‚ and six 30cm strips of dialysis tubing. EXERCISE 1C: Water Potential The materials that were used included 50mL of distilled water‚ 0.2M sucrose‚ 0.4M sucrose‚ 0.6M sucrose‚ 0.8M sucrose‚ and 1.0M sucrose‚ six 250mL cups with lids‚ 4 potato cores for each cup‚ a balance‚ and paper towel. EXERCISE 1D: Calculation of Water Potential from Experimental Data This exercise required
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The Effect of Concentration Gradient on Osmosis Abstract: Osmosis is the passive movement of water from an area of higher concentration to an area of lower concentration‚ usually across a membrane (Thorpe 2013). Tonicity is the ability of a solution surrounding a cell to gain or lose water (Reece 2011). There are many factors that affect the rate of osmosis. These include temperature‚ surface area‚ difference in water potential‚ pressure‚ light and dark and most importantly what we will be talking
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The digital clock can be extracted from an inexpensive alarm clock or it can be purchased from an electronics store. Slice of about 1 inch from each carrot and discard. Place the remaining pieces next to each other‚ flat face down on a plate. Strip off about 2 inches of insulation from both ends of each wire. Wrap one end of one wire around one of the nails. Press the nail into one of the carrots pieces. Wrap one end of another wire around one of the pennies. Do this by first laying the penny
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use of the current. A closed circuit allows a direct‚ uninterrupted flow of electrons out from the power source and back again in a complete circular connection with no beginning or end. Our group has proposed this study to see if lemon/orange/potato would be a suitable dry cell to use for daily routines. B. Statement of the Problem • Which of the organic batteries can best emulate the quality of an AAA battery? Is it the cheapest of the
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Stacy Hernandez Period 1 Mrs. Riley AP Biology Osmosis and Diffusion Lab I. Introduction: Diffusion is vital to many life functions of a cell‚ it allow the transportation of vitally important nutrients and compounds without the expenditure of excess metabolic energy. To explain diffusion‚ it is as if a bottle of perfume is opened at one end of the room‚ then in a short amount of time a person at the other end of the room can detect the scent of the perfume; this is the process of diffusion
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increase the reaction. As I increase the surface area of the potato the gas given off from the reaction will increase. Therefore to sum things up‚ my hypothesis is when the Independent variable increases so will the dependant variable. Independent variable: - Surface area of potato Dependant variable: - Gas Controlled variable: - Equal size of potatoes used - Using measuring cylinder Equipment used: - Gas collecting kit - Potato - Stop watch - Test tube - Distilled water - Hydrogen
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– Varying Extracellular Concentration Introduction: This experiment sets out to determine the tonicity of solutions with varying concentrations of sodium chloride on the red blood cells of sheep by measuring the transmittance of a red blood cell/NaCl solution with a spectrometer. This is done in order to study the effects of solutions containing varying levels of tonicity to red blood cells. Tonicity describes what happens to a cell when it is placed in a certain solution. Hypertonic solutions contain
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Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to not-so-shiny strips that are stained with dark‚ reddish-brown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after
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Enzyme Lab Experiments Problem: How can we demonstrate how enzymes work? What happens if we alter the environment of an enzyme? Materials: G;lucose Test Strips Test Tubes Pipettes Raw Hamburg Lettuce Potato Raw Liver Chalk Beakers Dairy Lactose Tablet Water Sugar Solo Cups Hot Plate Knife Gloves Skim Milk Glow Sticks Peroxide Hypothesis: 1. If we change the environment via temperature the glow stick will Its intensity will change 2. If hydrogen peroxide is added to a certain food liver
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Cheese Sauce Broccoli/Chz Sauce Bug Bites MAR. 13 BBQ Rib/Bun WG Sweet Potato Fries Baked Beans MAR. 14 Chicken & Noodles Mashed Potatoes/Gravy Dinner Roll Peas MAR. 17 Chicken Nuggets WG Sweet & Sour/Gen Tso Sauces Brown Rice Corn MAR. 18 Country Fried Steak Mashed Potatoes/Gravy Glazed Carrots WW Bread/ Jelly MAR. 19 Cheese Quesadilla WG Spicy Pinto Beans Peas Sour Cream/Salsa MAR. 20 Mini Corn Dogs Glazed Sweet Potato Broccoli/Chz Sauce MAR. 21 Popcorn Chicken WG Mashed Potatoes/Gravy Green
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