Light Intensity Characteristics of Photocells The photoelectric effect is defined as the emission of electrons from a material by visible light. The cadmium sulfide photocell is used to act as a conductor once exposed to light‚ allowing light to travel through. However it also acts as an electric resister (an opposition to a current flowing in a circuit) once not exposed to light. The photocell serves today ’s cause in a sufficient manner. It is used for a variety of reasons but it is mainly
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Hypothesis (Null): There will be no effect upon different distance intensities of light on the terrestrial isopods. IV: The different distance intensities of light at specified lengths (1 meter‚ 2 meter‚ and 3 meters) DV: The number of terrestrial isopods (rolypolies) on the unlighted side on the petri dish. Control: The unlighted side of the opened up petri dish. Purpose: To determine the light sensitivity of terrestrial isopods (rolypolies) in different levels of lighted environment. Number
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Chlorophyll Extraction This easy science project shows simple and efficient method of chlorophyll extraction from a plant. This is only a demonstration of working method which can be refined and used for a full scale science project. Plants contain many pigments in different proportions. For flowering plants it’s mostly a combination of chlorophyll-A‚ chlorophyll-B‚ pheophytin and Carotenes. These pigments have shades of green‚ blue green‚ grayish‚ and yellow-orange. Their concentration is
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The Effect of Duckweed on Natural Pollutants: Part I- Introduction Duckweed: What is it? When you type in “duckweed”‚ or Lemnaceae‚ if you choose to use the scientific name‚ on your computer‚ you see countless entries on how to get rid of duckweed from your pond‚ how much duckweed can be a nuisance when it gets stuck in your fish filter‚ etc. However‚ this is a plant that can be underestimated. I chose to work with duckweed in my project because of the countless ways it can help the environment
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The common duckweed also known as Lemna is often found in ponds‚ wetlands‚ and occasionally lakes. Duckweed is a very small‚ light green free-floating seed bearing plant. (aquaplant.com) Duckweed is known to take over the source of water it is in‚ in little time. It is forceful and can mix with other plants. The bodies of water that duckweed is mostly found in do not have waves or a strong current. They are typically only in still bodies of water although they can be found elsewhere. They are found
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BIOLOGY PRACTICAL ASSIGNMENT NAME OF INVESTIGATION: Effect of Eutrophication on Plant Growth RESEARCH QUESTION: How does the process of Eutrophication affect the growth of Duckweed? HYPOTHESIS: In this experiment‚ we are basically testing the use of different fertilizers on the growth of Duckweeds. Plants need fertilizers for their growth and to increase the yield of crops. But‚ at the same time‚ it depends on which Fertilizer being used and in how much proportion. Does it have sufficient nutrients
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Effects of Wavelength and Light Intensity on Photosynthetic Activity ABSTRACT The photosynthetic process of eukaryotes revolves around chlorophyll‚ the substance that give plants their green color. Plants convert light energy into chemical energy by means of photosynthesis. This experiment tests the reaction rates of a chloroplast suspension against variables of wavelengths and light intensity. Both a control and an experimental cuvette were exposed to a range of 450 to 750nm of light and varying
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How does light intensity and carbon dioxide levels affect photosynthesis rate Phaladi Phaladi 201102379 Department Of Mathematics And Science Education University Of Botswana Plants‚ through the use of chlorophyll (green pigment in plants) that traps light can generate ‘food’ by combining carbon dioxide in the air and water. As with many chemical process energy is need to make and break molecules during the chemical process. The greater the light levels the more energy is available to carry
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In conclusion‚ one can determine how photosynthesis is impacted by light intensity through the experimentation on ivy leaf disks in a bicarbonate solution. The function of the sodium bicarbonate in this experiment was to provide a sufficient amount of carbon dioxide (CO2) for the photosynthesis process to occur. Without CO2 or any of the other necessary reactants‚ glucose nor oxygen cannot be produced. The leaves rise and sink due to photosynthesis occurring in the plant cells. As the carbon from
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ctLIST OF CONTENTS Chapter No | Title | Page Number | | Executive Summary | | 1 | Organizational Study | | 2 | Research methodology | | 3 | Review of Literature | | 4 | Data Analysis and Interpretation | | 5 | Findings and Suggestions | | 6 | Conclusion | | | Bibliography | | | Annexure | | LIST OF TABLES Table No: | TITLE | Page no: | 4.1 | Table showing gender of customers | | 4.2 | Table showing income level of customers | | 4.3 | Table showing
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