Biodiversity Introduction: Species rich meadows are the most species rich plant communities on earth. Of the 2200 species of flowering plants found in Sweden‚ one fifth is considered to be threatened. The most common cause of the species lost is that species’ habitat has been affected by humans. However‚ in northern Europe‚ there is another pattern since farmers have used the land for more than a thousand years in a way that contributed to a greater number of species present. In this investigation‚ I am
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Criminal Investigations The method of inquiry is the way that an investigator or detective gathers information about a specific case. There is several different method of inquiry such as evidence collection‚ witness and victim statements‚ and information stored in public and private databases. The methods of inquiry are used to figure out what happened at a particular crime scene. A criminal investigator is trying to establish the who‚ what‚ where‚ when‚ why‚ and how of the crime. During this process
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Information Osmosis is one of the four methods of moving particles across membranes along with simple diffusion‚ facilitated diffusion‚ and active transport. Water is able to move in and out of most cells freely. Sometimes the number of water molecules moving in and out is the same and there is no net movement‚ but at other times the molecular movement from one direction exceeds the movement from other direction and creates a net movement. This net movement is called osmosis. Osmosis is due to differences
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Science February 6 2009 - February 19 2009 Conductor Investigation Calvin Chang 8.2 Stage 1: Planning the Experiment Introduction ! By “electric current”‚ I mean by the rate at which electric charges moves through a circuit‚ the electric charges can either be ions or electrons. They are measured in ammeters and the unit that is measured in is ampere which is the number of charges that passes through per second. There are many factors which would affect the electric current‚ like the voltage of
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Diffusion of responsibility is a pervasive socio-psychological phenomenon that is deeply entrenched in all societies. This tends to occur when the size of a group reaches a certain threshold and individuals within the group assume that others will take action or have already intervened‚ commonly resulting in the collective inaction by potential helpers. Another contributing factor is the gender of the individual in need for help which affects the action/inaction of the individuals in the group. The
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food molecules and oxygen. Chloroplast 2. This organelle is constructed of cellulose and supports plant cells and prevents them from blowing up. Cellulos 3. This organelle contains enzymes for intracellular hydrolysis of food molecules. Lysosom 4. This organelle takes in food molecules and oxygen and can transfer the food energy to ATP batteries‚ which will eventually collision energy for chemical reactions. Products of these events are carbon dioxide and water. Mitocondria 5. These organelles
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Osmosis is the diffusion of water molecules from an area of high concentration of sucrose solution to an area of lower concentration of sucrose solution‚ through a selectively permeable membrane. The water molecules move down a concentration gradient in osmosis. Two diagrams of osmosis are shown in figures 1 and 2. Figure 1 shows the diffusion of water molecules through a selectively permeable membrane from an area of highly concentrated sucrose solution to an area of lower concentrated sucrose solution
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Biology laboratory work: Osmosis observation Measuring the dependence of net mass gain in potato pieces on concentration of sugar solution By Jonas Kulikauskas Siauliai Didzdvaris Gymnasium Hypothesis: The more sugar in solution‚ the more potato mass will decrease. Aim: To see how potato mass will change at different concentration solution. Research question: How the mass of potato will change at different concentration solutions? Variables: Dependent: solution concentration. Independent:
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and Social Change course‚ I had no idea what to expect for our curriculum. Discovering the process of influencing others and group choice has been enlightening for us as a class. Actually‚ Diffusion of Innovation Theory‚ which was developed by Rogers in 1962‚ is one of the oldest social science theories. Diffusion of Innovations seeks to explain how innovations and social changes are taken up with a segmented group of people. Through knowledge and application of research-based theories‚ we have grown
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Lab Report Diffusion is - One of two kinds of passive transport‚ - Diffusion can transport ions from higher concentration to lower concentration region without any other forces. - A net movement of molecules in and out of cell membrane - Diffusion can be affected by the steepness of the concentration gradient. Lab question: Is the rate of diffusion influenced by the presence of second molecule? Prediction: the rate of diffusion is influenced by the presence of second molecule
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