Evidence of Photosynthesis Photosynthesis is the process during which a plant’s chlorophyll traps light energy and sugars (glucose) are produced. In plants‚ photosynthesis occurs only in cells with chloroplasts. Water (H2O)‚ carbon dioxide (CO2) and light energy are required. The light energy is absorbed by the green pigment‚ chlorophyll‚ and is converted into chemical energy‚ which causes the water drawn from the soil to split into molecules of hydrogen and oxygen. The hydrogen combines with
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have light‚ air and water in order to grow. Light is a major component because plants need it in order to survive in their habitats because they use it to make food through photosynthesis. Light is also used to reflect off a natural green color‚ which is absorbed by the green pigment‚ chlorophyll. Aim What effects does sunlight and no light have on growing plants? The goal of this lab is to determine the effects of different approaches of growing seedlings and to understand these effects. Hypothesis
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process of photosynthesis requires sunlight for its nutrients to make their way into the chlorophyll on green plants. This suggests that without direct sunlight‚ photosynthesis will not be completed correctly or the plants functions will not work properly. Majority of plants that undergo photosynthesis have chlorophyll stored within them‚ it is what gives them their green color. However‚ there are few species of plants that don’t acquire chlorophyll‚ but still undergo the process of photosynthesis. Specific
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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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Investigation of the effect of light intensity Equipment: * Data loga * Light sensor * Bulb * Metre ruler X3 Variables: Independent variable – distance of the light sensor from the light source (m) Dependant variable – intensity of light (lux) Control | Why it needs to be controlled? | How will you control it? | Bulb | There are different watts in different bulbs | Use the same bulb‚ but if your one does break half way through the experiment you can use another bulb with the
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The Refraction Of Light Through Different Media Mr. Dechene’s SNC2D January 21‚ 2013 Jordyn D. Testable Question: What effects do different mediums have on the angle of light? Hypothesis: If the light goes through different mediums‚ then the light will bend because it is slowing down as it passes through the medium. Equipment: Semicircular plastic dish Polar graph paper Ray box with single slit Water Syrup Experimental Design: A ray box with a single
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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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HW Review for Photosynthesis exam: Due Monday March 28 Reminder your lab write up will be a next week. If your lab is this Friday you also will get a week to complete your full lab write-up. Sample questions: 1. twenty-five plants were placed in each of four closed containers and then exposed to light conditions shown in the data table below. All other environmental conditions were held constant for a period of 2 days. At the beginning of the investigation‚ the quantity of CO2 present in each closed
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Photosynthesis Abstract: An experiment was carried out to determine how certain factors such as light intensity and availability of carbon dioxide‚ affected the rate of photosynthesis. The rate of photosynthesis was measure by the amount of oxygen produce (cm3/min). A valid conclusion was made and most of the results were in accordance with the prediction‚ although there were some anomalies present. The errors and limitations were evaluated and some improvements were suggested. Introduction: Photosynthesis
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PHOTOSYNTHESIS LAB Alyssa Wright VARIABLE: LIGHT INTENSITY AIM: to investigate the effect of light intensity (lux) on the amount of oxygen produced (number of bubbles) HYPOTHESIS: I predict that the rate of oxygen produced increases‚ as the light intensity increases‚ but only to a point. I predict this will happen because the plant will have enough carbon dioxide and water to keep up with the amount of light that there is. When there is less light intensity‚ photosynthesis will happen
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