The Effect of Absorption Rate on Light and Dark Colored Leaves. A particular leaf color may have an effect on the leaf’s absorption rate. An experiment was conducted to determine the relationship between a leaf’s absorption rate and color. A group of students tested spinach, cabbage, and no chloroplast solutions to determine the relationship it has with the absorption rate. It was found that darker colored leaves have a higher absorption rate than lighter colored leaves when analyzed from the graphs. This is highlighted by noting that the lighter colored leaves remained constant during the majority of the experiment. It was concluded that a leaf’s pigment can affect the amount of light energy being absorbed in different wavelengths.
In this lab, different leaves will be tested to determine if the absorption peaks will be affected by the multiple colors of leaves from using a chlorophyll extract. It is known that all plants consist of chlorophyll. Chlorophyll is a green photosynthetic pigment that absorbs sunlight (ScienceDaily, n.d.). Also, chlorophyll is essential in a process known as photosynthesis that takes place in plants and other organisms (HowStuffWorks, 2008). Photosynthesis synthesizes carbohydrates known as sugars by utilizing the light energy absorbed by plant or other organisms’, and carbon dioxide and water.
Chlorophyll obtains its green pigmentation from absorbing certain colors of light on the spectrophotometer. A spectrophotometer is an instrument that is used to measure the light energy that is absorbed at different wavelengths (Spectrophotometer, n.d.). The wavelength absorbed by chlorophyll is about four hundred nanometers and seven hundred nanometers. Chlorophyll reflects green pigments because it mostly ab...
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Chlorophyll. (n.d.). ScienceDaily. Retrieved April 27, 2014, from http://www.sciencedaily.com/articles/c/chlorophyll.htm
Chlorophyll. (2008, October 29). HowStuffWorks. Retrieved April 27, 2014, from http://science.howstuffworks.com/dictionary/plant-terms/chlorophyll-info.htm
Cook, B. (n.d.). How a Tree Grows by Brent Cook. How A Tree Grows. Retrieved April 27, 2014, from http://dendro.cnre.vt.edu/forsite/2004presentations/brent/lightleavesautumncolors.htm
Photosynthesis: Chlorophyll. (n.d.). Photosynthesis: Chlorophyll. Retrieved April 27, 2014, from http://www.phschool.com/science/biology_place/biocoach/photosynth/chlorophyll.html
SPECTROPHOTOMETER USE. (n.d.). Spectrophotometer Use. Retrieved April 27, 2014, from http://biology.clc.uc.edu/fankhauser/labs/microbiology/Growth_Curve/Spectrophotometer.htm
Some sources of error in my experiment can be found mainly in my research of the tropical trees. In the tropical zone and temperate zone, most trees were too tall to reach and examine their leaves. Furthermore, it was hard to get the entire tree within our pictures. Therefore, this caused little information about the large trees in the tropical zone, giving our information less variation. This error was also implemented throughout all the zones. Another source of error was with the light shining upon the leaves. During our experimentation, there were moments in time where the sun was hidden and the sun was shining brightly. Therefore, possibly affecting the color of our leaf color. The sunlight may cause our leaf to look lighter than they possibly are. This could cause false information to compare the leaf colors for each biome.
Investigating the Effect of Light Intensity on the Size of a Plantain Leaf Title: To investigate the effect of light intensity on the size of a plantain leaf. Hypothesis: I predict that the size of the plantain leaves would increase as the light intensity decreases. Therefore, plantain leaves found in the shade will have larger surface areas than leaves found in an open area. Theory: Sunlight is an essential factor need to complete the process of photosynthesis.
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
= > [CH2O} + O2 + H2O, This shows that when the light intensity is increased the rate of reaction will be more quicker he only anomalous result there was, is the one in the 100 watt result the reading after 5 minutes is anomalous because it does not follow the predicted pattern of increasing in the production of gas because it is lower I know from my own knowledge of photosynthesise that when the light intensity is increased the rate of reaction will be more quicker because many plants and trees photosynthesise quicker in stronger light and photosynthesise slower in dimly lit places. The chlorophyll absorbs light energy and enables it to be used by the plant for building up sugar. The overall effect is that energy is transferred from sunlight to sugar molecules.
In this laboratory experiment, the rate of photosynthesis was measured through the use of the “floating leaf disk technique.” The leaf disks were placed into a syringe and the O2 and CO2 in the mesophyll layers of the leaves were removed and then replaced with sodium bicarbonate or water, causing the leaves to sink to the bottom of the container. If one determines the number of leaf disks rising to the top as a result of an increase in oxygen gas in the mesophyll cells, then the rate of photosynthesis is able to be measured because O2 is a product of photosynthesis. The first step of this experiment was a feasibility study of the variance in the photosynthetic activity of the leaf disks in both water and bicarbonate solutions. After five minutes of light exposure, all of the leaf disks in the bicarbonate solution (10 disks) had ...
energy as yellow would. Red will have a very high photosynthetic rate. even though it has the longest wavelength and therefore carries the least energy it will be greatly absorbed so a lot of the light energy will be used rather than reflected. Prediction graph. [ IMAGE] Photosynthetic equation =
[IMAGE]Carbon dioxide + water Light Energy glucose + oxygen Chlorophyll [IMAGE]6CO2 + 6H20 Light Energy C6 H12 O6 + 6O 2 Chlorophyll Photosynthesis occurs in the leaves of the plant in the palisade layer. Chlorophyll in the cells in the palisade layer absorb light for photosynthesis. The plant releases the oxygen created in photosynthesis back into the air but it uses or stores the glucose for energy, respiration, growth and repair. The leaves and plants are also specially adapted for photosynthesis in their structure and cell alignment. Preliminary Experiment Apparatus * Piece of Elodea Canadensis * Bulb * Voltmeter * Test tube * Beaker * Box *
I chose to measure this growth by observing the number of stomata present on the underside of leaves exposed to the dark and to sunlight. Based on the idea that there are more open stomata present on leaves exposed to the sun, my hypothesis that 'Factors which might affect stomatal opening' (Light) there will be more stomata on the plants exposed to the light. Hypothesis = == ==
The structure of chlorophyll involves a hydrophobic tail embedded in the thylakoid membrane which repels water and a porphyrin ring which is a ring of four pyrrols (C4H5N) surrounding a metal ion which absorbs the incoming light energy, in the case of chlorophyll the metal ion is magnesium (Mg2+.) The electrons within the porphyrin ring are delocalised so the molecule has the potential to easily and quickly lose and gain electrons making the structure of chlorophyll ideal for photosynthesis. Chlorophyll is the most abundant photosynthetic pigment, absorbing red and blue wavelengths and reflecting green wavelengths, meaning plants containing chlorophyll appear green. There are many types of chlorophyll, including chlorophyll a, b, c1, c2, d and f. Chlorophyll a is present in all photosynthetic organisms and is the most common pigment with the molecular formula C55H72MgN4O5. Chlorophyll b is found in plants with the molecular formula C55H70MgN4O6, it is less abundant than chlorophyll a. Chlorophyll a and b are often found together as they increase the wavelengths of light absorbed. Chlorophyll c1 (C35H30O5N4Mg) and c2 (C35H28O5N4Mg) are found in algae, they are accessory pigments and have a brown colour. Chlorophyll c is able to absorb yellow and green light (500-600nm) that chlorophyll a
Photosynthesis is a process in plants that converts light energy into chemical energy, which is stored in bonds of sugar. The process occurs in the chloroplasts, using chlorophyll. Photosynthesis takes place in green leaves. Glucose is made from the raw materials, carbon dioxide, water, light energy and oxygen is given off as a waste product. In these light-dependent reactions, energy is used to split electrons from suitable substances such as water, producing oxygen. In plants, sugars are produced by a later sequence of light-independent reactions called th...
Photosynthesis is a process in which plants and other organisms convert the light energy from the sun or any other source into chemical energy that can be released to fuel an organism’s activities. During this reaction, carbon dioxide and water are converted into glucose and oxygen. This process takes place in leaf cells which contain chloroplasts and the reaction requires light energy from the sun, which is absorbed by a green substance called chlorophyll. The plants absorb the water through their roots from the earth and carbon dioxide through their leaves.
Hue is the common name for the colours in the spectrum which are red, orange, yellow, green, blue, and violet. A pigment is a colouring ag...
According to scientists, photosynthesis is “the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.” ("pho•to•syn•the•sis,")
however it does not easily absorb green or yellow light, rather it. reflects it, this decreases the rate of photosynthesis. This can