diffusion - where water diffuses through a membrane which has different concentrations on either side. Permeable means "allows anything to pass through". Membranes in cells allow small molecules (water) to pass through‚ but prevent bigger ones from passing. This is called "selectively permeable". Take a look at the following animation; If a selectively permeable membrane separates the two solutions‚ water moves through it in both directions at the same time. However‚ more water leaves a dilute
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Number One: The Importance of Water in Ancient Civilizations When life began there was water to help it grow and when life is over there will be water to end it. Water is a basic necessity that furnishes the plants for growth‚ replenishes mammal life‚ and is a constant reminder of life. In ancient complex river societies water provided a beginning and advancement opportunity in agriculture in that it cared for plants‚ provided for animals‚ replenished drinking water‚ and was a beacon for trade
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eInvestigating water potential of swede The aim of our experiment was to investigate the water potential of swede and then use our results to help us determine the water potential of plant tissue. This overall flow of water from a dilute area of high water potential to a more concentrated solution of low water potential across a partially permeable membrane is called osmosis. I predicted that the swede cylinders which are put in a test tube with a low potential of sucrose solution would become
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Aim: The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material. I did the investigation in two parts‚ the first part of my investigation was my preliminary investigation and then I did my official investigation. In both of my investigations there are several similarities‚ such as fair testing‚ variables‚ key variables‚ reliability
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drinking water in a small station located in a sparse population in Kenya near the border with Sudan. The Pan African News Agency reported that eight monkeys were killed and 10 villagers hurt in what was described as a “fierce two- hour melee.” The fight came into matter when relief workers appeared and started distributing water from a tanker truck. The local community stated that an extended drought had left animals with no choice but to roam out of their natural habitats to seek clean safe water in
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science fair project is on the surface tension of water and what affects the surface tension of water. The question that I am going to ask is how does temperature and salinity of water affect the surface tension of the water. My hypothesis is that the colder and the saltier that the water is‚ the stronger that the surface tension of the water will be. Some of the background research that I have done has explained to me that the surface tension of water is a property of a liquids surface that can cause
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Aim: To determine the water of crystallization in washing soda crystals (Na2CO3.xH2O) Research Question: What is the percentage composition and the amount (in moles) of water in the given ionic hydrate? (Na2CO3.xH2O) Background Information: Sodium Carbonate also known as Washing Soda (Na2CO3.xH2O) is a sodium salt of carbonic acid. Sodium carbonate is domestically well known for its everyday use as a water softener. It is also used to remove grease‚ oil and wine stains. It can be extracted from
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Nitrate on Pond Water By Claudia Phillips September 6‚ 2014 Block Two INTRODUCTION This lab was designed to study and observe the effects of phosphate and nitrate applied to pond water (1). Phosphorous‚ commonly used in fertilizers‚ is a necessary and vital element for life but can enhance the effects of eutrophication (the over-enrichment of nutrients in water) (2). Nitrate is a common source of food for most algae‚ but too much can make living conditions in water harsh (3). They are
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polluted water so the water will have a clarity of 0%. If a filter is built for the polluted water‚ then the waters clarity will be 0% and the pH value will be 7. The purpose for this lab is to get the polluted water to a clarity of 0%. Water pollution is playing a major role in today’s ecosystems because the water is becoming unsafe to live in and unsafe to consume. “Water pollution is any physical or chemical change in water that adversely affects organisms” (Chiras‚ 2015). When the water is dirty
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What is the optimal drinking water for humans? It is a truth universally acknowledged that water is the cornerstone of good health. Since the human body is composed of about 60% water‚ intake is vital to almost every function; digestion‚ circulation‚ transportation of nutrients and‚ most importantly‚ the elimination of toxins. In addition‚ water contains various nutrients that are essential to maintaining good health. These include sodium‚ an important extracellular electrolyte‚ and selenium‚ required
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