Diffusion Osmosis Lab Report - 1295 Words

Ellice Johnson Period 1 October 12, 2012 Diffusion and Osmosis Shown In Solutions Section 1: Abstract This lab, title Diffusion and Osmosis, was centered around the diffusion across a cellular membrane and how exactly materials move and diffuse in concentrations. Both diffusion and osmosis are forms of movement that are part of passive transport dealing with cell membranes. Diffusion is where the solutes move from an area of high concentration to a low concentration. Water goes through the cell membranes by diffusion. Osmosis is specifically the movement of water through membranes. Since osmosis and diffusion are both part of passive transport, this means that they do not require energy or pumps. There are different environments†¦show more content†¦I took the five dialysis tubings which were acting as cells and filled them with 10 mL of each solution. We knotted each end but made sure to leave enough space at the top for water to diffuse in the cell. The initial weight was taken and recorded in a data table. The five cells were placed in a beaker filled with water for 30 mi nutes. After the 30 minutes, the cells were weighed, and the final weight was recorded in the data table, and then the percent change was calculated. The materials used in this procedure were beakers, water, sucrose, glucose, NaCl, ovalbumin, 20 cm-long dialysis tubing and balances. In the inquiry, I predicted that the blue solution was water and that it would have an isotonic environment, meaning there would be no percent change.I first cut the potatoes into 6 cylinders of the same size by using a cork. I got six beakers and filled each with 20 mL of the different color-coated solutions with different concentrations (orange, red, yellow, green, blue purple). The initial mass of each potato cylinder was taken before placing in the solution. I placed the potatoes in the appropriate labeled beaker (1-6) of each solution and let them sit there for 30 minutes. After the 30 minutes, I took the final mass of each cylinder and calculated the percent change in mass.The materials that were used in the inquiry were potatoes, corks, pipettes, balances, scalpels, beakers, and the color-coded sucrose solutions.Show MoreRelatedLab Report : Diffusion And Osmosis Experiment1088 Words   |  5 PagesLab Report Diffusion Osmosis Experiment Sydney Mask INTRODUCTION All cells in the human body are surrounded by a plasma membrane made up of lipids and proteins which form a barrier. The proteins and lipids in the membrane occupy different roles. The lipids create a semipermeable barrier and the proteins are part of a cross membrane transport. To pass through the membrane a substance goes through a transport known as diffusion. Diffusion is movement of molecules from a high area of concentrationRead MoreDiffusion and Osmosis Lab Report2788 Words   |  12 PagesHands On Approach to Diffusion and Osmosis Abstract A. Plant and Animal Cell Diffusion and Osmosis In this experiment we observed carmine powder to better understand the concept of Brownian motion and the role of molecular movement in diffusion. The particles continuously moved in a completely random fashion, and the smaller particles moved with more speed than the larger particles. B. Potato Core Experiment In this experiment we estimated the osmolarity of potato tuber tissueRead MoreDiffusion And Osmosis Lab Report1455 Words   |  6 Pages Diffusion and Osmosis Lab Biology AP Luis Macias October 01, 2015 - October 09, 2015 Abstract The Diffusion and Osmosis Lab determines the molarities of various sucrose solutions based on change in mass. Using table sugar in different amount of molar concentration 0.0M, 0.2M, 0.4M, 0.6M, 0.8M and 1.0M. The molarity of the solution of the sucrose solution in the dialysis tubing determines the amount of water that either move into the bag or out the bag, which also means its mass changedRead MoreDiffusion And Osmosis Lab Report1012 Words   |  5 Pagesstudy â€Å"Diffusion and Osmosis,† was based on the passive movement of molecules in biological systems. To begin with, â€Å"osmosis is the diffusion of water across a differentially permeable membrane†(99). While diffusion specifically involves the â€Å"passive, directional movement of molecules.† The direction of diffusion depends on several factors including, concentration of gradient, pressure, and heat, diffusing from high to low concentrations (96). Ultimately, these water molecules during osmosis and diffusionRead MoreOsmosis And Diffusion Lab Report1934 Words   |  8 Pagesthe solute. The solute and solvent together are known as a solution. Osmosis and diffusion are passive transport mechanisms, meaning that no energy has to be added into the system in order for transport to occur, which the cell uses in its selectively permeable membrane. Osmosis involves the transportation, or movement, of water from an area of low solute concentration to an area of higher solute concentration. Diffusion is the movement of solute particles from areas of high solute concentrationsRead MoreOsmosis and Diffusion Lab Report Introduction All Cells Contain Membranes That Are Selectively Permeable, Allowing Certain Things to Pass Into and Leave Out of the Cell. the Process in Which Molecules of a Substance1016 Words   |  5 Pagessubstance move from an area of high concentration to areas of low concentration is called Diffusion. Whereas Osmosis is the process in which water crosses membranes from regions of high water concentration to areas with low water concentration. While molecules in diffusion move down a concentration gradient, mol ecules during osmosis both move down a concentration gradient as well as across it. Both diffusion, and osmosis are types of passive transport, which do not require help. When the concentrationRead MoreEssay about Cell Membrane Transport600 Words   |  3 PagesMembrane Transport Hands-On Labs, Inc. Version 42-0034-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this informationRead MoreBiology Osmosis Lab Report Essay1890 Words   |  8 PagesOsmosis Lab Report by Evan Gerber Claire Cambron First Lab Report Wednesday 10:30am February 20, 2013 Theresa Gburek Abstract The major objective of the experiment was to test the effect of the concentration gradient on the diffusion rate. It was hypothesized that the greater the stronger the concentration gradient, the faster the rate of diffusion would be. To test this, dialysis tubes were submerged in different concentration fructose solutions. We weighed the tubes at specificRead MoreLab Report On Egg Osmosis1023 Words   |  5 Pages Egg Osmosis Lab Report Yen Do Period 2 Introduction: Cells in all living things have an outer layer known as the cell membrane. The structure of the cell membrane consists of the phospholipid bilayer organized by the arrangement of hydrophilic heads and hydrophobic tails. It is a selectively permeable membrane, where it divides the outer environment from the interior of the cell. It can control substances moving in and out of living cells. Certain molecules like gases, water, and foodRead MoreEssay on Physio 9.0 Lab 1:3969 Words   |  4 PagesExercise 1: Cell Transport Mechanisms and Permeability: Activity 3: Simulating Osmotic Pressure Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Which of the following is true of osmosis? You correctly answered: c. It is a type of diffusion. 2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is You correctly answered: a. the concent ration

Flappers, Conservativism and Changes in Fashion - 1103 Words

Since the early twentieth century, there have been many fads and changes in the fashion industry. From cloche hats in the early 1900s, to big hair in the 1980s and to the low rise of jeans of the present day fashion still continues to evolve with the way society changes. The Merriam-Webster dictionary defines fashion as, a popular way of dressing at a particular time or among a particular group of people. Throughout history, fashion has been changing. Whether it is a group wanting to make a fashion statement, or a change in society’s views, there will always be something new. In the early twentieth century, society had a fairly conservative mindset on their views of clothing and their actions. Women’s fashion has become liberal as the years progressed because of the independence that women achieved. After the Women’s Rights movement and WWI, it became increasingly common to see women in the labor force. Women gained independence and wanted to rebel from societa l norms. This is evident of the flappers of the 1920s to the Sexual Revolution of the 1960s. Society’s view on conservatism had changed throughout time. In the 1920s the flappers were viewed as more risquà © during their time. However, compared to the Sexual Revolution of the 1960s, the flappers were far from risquà ©. In the early twentieth century, people dressed very conservatively. Men wore slacks and collared shirts, while women wore dresses or skirts that extended well below the knees. These were what society

Spanish Oral Rubric free essay sample

Oral Exam| Excellent 4 pts| Good 3 pts| Fair 2 pts| Poor 1 pt| Content| Student completes all tasks given and incorporates other tasks previously learned. Mastery of a variety of grammar structures and vocabulary is evident. | Student completes all tasks but does not incorporate tasks previously learned. A small amount of variety in grammar structures and vocabulary is included| Student completes some but not all tasks assigned. Basic grammar and vocabulary are the base of the presentation| Student completes some but not all tasks assigned. Development of vocabulary and grammar is necessary| Organization and presentation| Student is prepared and rehearsed with no pauses. Does not need to use notes. Connects with the class (eye contact, etc)| Student is prepared and somewhat rehearsed. Presentation has very short pauses. Student glances at notes from time to time | Student could have practiced more. Long pauses may interrupt flow of presentation. Student has to rely often on notes or backtrack to a missed point. We will write a custom essay sample on Spanish Oral Rubric or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Had difficulty understanding presentation. Obviously not rehearsed. Too many long pauses or reading directly from notes. | Accuracy (grammar syntax)| Practically no errors. Student shows an excellent command of grammar for his/her level. He/she uses basic and more –complex grammatical structures, generally accurately. | Sporadic errors. Student shows a developing command of structures studied and may self-correct while speaking. He/she uses basic grammatical structures, generally accurately. There are some attempts at more-complex structures. | Several errors. Student makes several errors including common agreement errors, but these do not obscure the main points and meaning in understood by teacher. There is some inappropriate word choice. The student uses basic grammatical structures, though with some errors. | Numerous errors interfere with communication and cause difficulty in understanding. The student uses a limited vocabulary, and has difficulty in finding words. Fluency| Student spoke loudly and clearly with good tone. Spoke fluently, without hesitation or repetition. | Sporadic errors. Student shows a developing command of structures studied and may self-correct while speaking | Several errors. Student makes several errors including common agreement errors, but these do not obscure the main points and meaning in understood by conver| Numerous errors interfere with communication and cause difficulty in understanding. Pronunciation | The student’s pronunciation and intonation are clear and make communication easy. | The student’s pronunciation and intonation have some errors, though thee don’t interfere with comprehensibility. | The student’s pronunciation and intonation have some errors, some of which make understanding difficult. | The student’s pronunciation and intonation have many errors and make understanding difficult throughout the exchange. | Examen Oral del semestre.

Tiananmen Square And How It Relates To free essay sample

The Good Earth Essay, Research Paper The Tiananmen Square Protest ( and how the subjects relate with The Good Earth ) The Chinese authorities at the clip of the Tiananmen Square protest was a communist absolutism that was get downing to follow capitalist economic sciences. The authorities ruled by fright. Many of their politicians were corrupt. There are some types of issues that the Tiananmen Square protest has in common with The Good Earth. In both, there are cases where one individual alterations something that affairs. When the dissenters were being shot by armored combat vehicles and work forces with guns, one adult male stood in forepart of a row of traveling armored combat vehicles, make bolding them to run over him. The armored combat vehicles did non run over him and by halting them he may hold saved 100s of lives. In The Good Earth, a adult male gives up his last nutrient to Wang Lung so that he can feed his kids and maintain them from hungering to decease. We will write a custom essay sample on Tiananmen Square And How It Relates To or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Hu Yaobang was general secretary in China until he # 8220 ; overstepped # 8221 ; his bounds and was forced to retire. Near his decease he was public about his sentiment that China should be a democracy. When he died, 1000s of pupils gathered to demo that they agreed and that they wanted China to be a democracy. They began a protest to demand the rights they thought they and the people of China were entitled to. They demanded warrants of human rights, chiefly freedom of address, freedom of the imperativeness, and freedom of assembly. The pupils said that a less corrupt authorities was necessary and that the civil war between mainland China and Taiwan must stop and be no more than friendly competition. Revision of the fundamental law to take everything that supported absolutism by trusting on the footing of category battle was besides a necessity. They besides said that their leaders needed to be held accountable for their actions. The leaders of the Chinese Communist Party were less than happy at the idea of these alterations because they eliminated most of their power and made them more vulnerable. The first few yearss of the Tiananman Square protest had an about carnival like atmosphere. Workers would demo up with their friends the minute their displacement was over. There were 1000s of people shouting and transporting streamers, which gave the first yearss the instead unworried feeling of organized pandemonium. Students from the University of Communications even formed a metaphorical roller coaster by associating custodies and organizing what they called a # 8220 ; traveling democracy wall # 8221 ; . When the universe heard what was go oning in Tiananmen Square , many people could non sit softly and take no action. One 67 twelvemonth old adult male said that when he saw how the pupils were enduring for their cause, it was excessively â€Å"pitiful† to watch and he decided to travel fall in them, conveying the message that both immature and old wanted China to alter. Many of the world’s people supported the Tiananman Square protest by assisting the protesters’ households and directing money and other support. However, there were besides many people who scorned the pupils and workers who were protesting because they were doing pandemonium. The book The Good Earth and the Tiananman Square protest have many similar subjects traveling on due to the fact that they both took topographic point at times when the construction of China was altering. Actually, a subject that played a outstanding function in both was alteration in position. Wang Lung # 8217 ; s position changed when he is able to purchase land from the Huang household because they had been so powerful and rich. Throughout the book he non merely additions position by purchasing their land, Wang Lung and his household finally replace the Huang household in their place of power. In China, merely a few old ages before the Tiananman Square protest, the Red Guard persecuted the once rich ( no 1 was truly rich ) and the educated. Most of the formerly rich and educated became hapless while some of the hapless people became richer. In both The Good Earth and the Tiananmen Square protest dealt with power battle in the society. In The Good Earth Wang Lung owns private land and works really difficult to do it turn nutrient. Around the clip of the Tiananmen Square protest, the possibility of having private belongings was merely returning to China. For about 40 old ages all land had belonged to the community and since everyone got an equal portion of what the land grew and of the crop, about no 1 worked really hard. The Tiananmen Square protest turned into a slaughter when the Chinese Communist Party brought armored combat vehicles and guns into Tiananmen Square and fired. Thousands of lives were lost. The quality of life in China improved for some, but none of the demands of the dissenters have been met. In China, both at Tiananmen Square and in The Good Earth, though many people die, life goes on. It is about as if history is reiterating its ego. In both The Good Earth and in China at the clip of the Tiananmen Square protest, societal category is an issue. In The Good Earth the societal category of a individual may alter really dramatically really rapidly, while China the clip of the Tiananmen Square protest tried to extinguish societal position all together.