Colour of Light Effects on Plant Growth Introduction Photosynthesis is the process of converting light energy to chemical energy and storing it in the bonds of sugar. Plants need water‚ Co2 and light energy to create sugar. Photosynthesis occurs mainly in leaves and in 2 phases: light reaction and dark reaction. The light reactions converts light energy to chemical (Biology.clc.uc.edu‚ 2014). This chemical reaction must take place in the thylakoid membrane. Chlorophyll (the green pigment involved
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covers assessment criteria 5 and 6 The Photoelectric effect‚ and the Production of Light In 1887 Hertz discovered the photoelectric effect‚ where electrons were emitted from a zinc surface when illuminated with ultra-violet light. These electrons (called ‘photoelectrons’) were only emitted when the frequency of the ultra-violet light was above a certain value (called the ‘threshold frequency’). Criteria 5c Assume that ultra-violet light is falling onto a piece of zinc‚ and photoelectrons are
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Distance from light/mm | Colorimeter reading/arbitrary units | | Algal balls solution | Hydrogen carbonate solution | | 1 | 2 | mean | 1 | 2 | mean | 0 | 0.52 | 0.52 | 0.52 | 0.50 | 0.50 | 0.50 | 250 | 0.52 | 0.45 | 0.49 | 0.59 | 0.63 | 0.61 | 500 | 0.50 | 0.49 | 0.50 | 0.52 | 0.55 | 0.54 | 750 | 0.47 | 0.55 | 0.51 | 0.54 | 0.53 | 0.54 | 1000 | 0.58 | 0.56 | 0.57 | 0.52 | 0.54 | 0.53 | Results Results The results do not show the general relationship between light intensity and photosynthesis
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Photosynthesis Experiment Introduction Photosynthesis is a process used by plants‚ making inorganic molecules into organic molecules (food) using sunlight. Carbon dioxide + Water (mainly from rain) Glucose + Oxygen From this process‚ carbon dioxide comes from environment. Glucose‚ as a product is used to make energy for growth. Lastly‚ the oxygen is a waste product in this chemical reaction‚ which become part of the Earth’s atmosphere. At this experiment‚ carbon dioxide and water
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Photosynthesis Lab Before you begin‚ save this Lab Report Template on your computer as LastNameAPBIOPhoto Read all the instructions below BEFORE you start! 1. Please go to the following website: http://www.biocourse.com/mhhe/bcc/domains/biolabs.xsp 2. Scroll down and click on the link to Photosynthesis. It is the 6th one down on the left. 3. Read the instructions for entering the virtual lab. There is background information in the online lab manual that will be helpful in interpreting
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Investigation 5: Photosynthesis Problem: If the leaf disks are treated in a way you know increases the net rate of photosynthesis‚ should they start to float faster or slower? Why? Hypothesis: If the leaf disks were bathed in a red light source‚ then the rate of photosynthesis would increase than leaf disks that are bathed in a regular light source because chlorophyll absorbs red pigment and reflects green pigments. Therefore‚ shining a red light source onto the leaf disks would cause them
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Samuel Turner Mr. Eichbauer IB Chemistry II – Period 6 16 February 2015 Investigation of the Effects of Acid Rain Background Information Acid rain is when there is a mix of wet and dry deposited material in the atmosphere that have higher levels of nitric and sulfuring acid. These chemicals formed can be from natural causes‚ like volcanoes and the decay of vegetation‚ or man made causes like fossil fuel combustion. Acid rain can be measured using the pH scale‚ and will always be on the lower
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THE UNIVERSITY OF ZAMBIA SCHOOL OF HUMANITIES AND SOCIAL SCIENCES DEPARTMENT OF ECONOMICS POSTGRADUATE STUDIES AN INVESTIGATION OF THE FISHER EFFECT IN ZAMBIA (1992-2011) A Research Proposal for the Dissertation in Partial Fulfillment of the Requirements of The Degree of Master of Arts RESEARCHER: MEBELO MUTEMWA COMPUTER NO.: 531004482 SUPERVISORS: DR. C. NG’ANDWE DR. C. MPHUKA DATE: AUGUST‚ 2012. * ABSTRACT This study seeks to investigate the extent to which
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Background Theory Photosynthesis: Plants require water from the soil‚ sunlight and carbon dioxide found in the atmosphere for growth and development. In the process of photosynthesis‚ carbon dioxide and water – in the presence of chlorophyll and light energy – are converted into sugar and oxygen‚ which is given off as a by-product. Generally‚ as sunlight increases in intensity‚ the rate of photosynthesis also increases [1]. This means greater food production within the plant. Many garden vegetables
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Factors Affecting Photosynthesis Low light intensity lowers the rate of photosynthesis. As the intensity is increased the rate also increases. However‚ after reaching an intensity of 10‚000 lux (lux is the unit for measuring light intensity) there is no effect on the rate. Very high intensity may‚ in fact‚ slow down the rate as it bleaches the chlorophyll. Normal sunlight (usually with an intensity of about 100‚000 lux) is quite sufficient for a normal rate of photosynthesis. Open and Closed
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