Termite Report

Better Essays
IS PHOTOSYNTHESIS WAVELEGNTH DEPENDENT? THE EFFECT of different COLOR FILTERS ON The rate of photosynthesis in english ivy leaves author: Cherylle chapman partners: sharif alston, ALEX SAFAVOV & EDuardo vie (Group 3)
OBSERVATIONS & HYPOTHESIS

In the lab, we observed green plant leaves convert light energy into chemical energy by using photosynthesis. The species of green plant leaves that were used in this experiment were Hedera helix, commonly known as English Ivy. These plant leaves have both mitochondria and chloroplasts. The process of photosynthesis takes place in the chloroplasts and aerobic respiration is carried out in the mitochondria, these reactions may occur simultaneously. To determine the rate of photosynthesis, we estimate the changes in the amount of oxygen produced in leaf disks. To do this, we first vacuum infiltrate the leaf disks to displace oxygen with water, this will make the leaf disks sink. Then, when we were ready to let photosynthesis begin, we exposed the leaf disks to light and they began to float, because the production of oxygen displaced the liquid. There is an inverse relationship between the time it takes the disks to float and the rate of photosynthesis; a slow rate of photosynthesis means leaf disks will float less quick. When we did this first experiment, we observed that light is needed for photosynthesis to occur, and in the presence of light leaf disks floats because of photosynthesis. This supports the fact that photosynthesis is light dependent.
To take this experiment a step further, we wanted to test the effect of different color filters (red and blue) on the rate of photosynthesis in English Ivy leaves. Since we already know that photosynthesis is light dependent, we wanted to see what would happen at different light waves. The justification for this comes from the fact that photosynthesis depends on the absorption of light by the pigments in plant leaves, called chlorophylls. We know that chlorophyll absorbs the most

You May Also Find These Documents Helpful

  • Good Essays

    Photosynthesis lab

    • 625 Words
    • 3 Pages

    The objective of this study was to figure out how different light colors affected the rate of photosynthesis in spinach leaves. This was done by taking leaf disks, removing the CO2 and sinking them in beakers. One beaker filled with regular water, the other filled with a mixture of water and sodium bicarbonate. The beakers were then placed in front of the light sources and the amount of disks floating was recorded every minute. In our study the disks exposed to the red light started to float sooner than the…

    • 625 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Photosynthesis

    • 2078 Words
    • 9 Pages

    Photosynthesis is a crucial biological process that occurs within the chloroplasts of plant cells where CO2 + H2O + Sunlight C6H12O6 + O2. The chloroplasts use light, an electromagnetic energy source, to produce food for the plant in the form of sugar molecules. During photosynthesis, the excited electrons from the light pass through proteins in the electron transport chain (ETC), where ATP and NADPH are produced. The CO2 absorbed by the plant are then fixed into carbohydrates by these two organic molecules (Hoober 1984; Halliwell 1984). It is currently known that plants do not use every colour of the visible light spectrum when undergoing photosynthesis, and that the different wavelengths of light are absorbed by the chlorophyll at different rates. In green land plants, the blue and red lights are most readily absorbed by the cells, whereas green light is not easily absorbed (Roberts and Ingram 2001).…

    • 2078 Words
    • 9 Pages
    Powerful Essays
  • Good Essays

    Spinach Lab Report

    • 1619 Words
    • 7 Pages

    More specifically, however, this experiment focused on the photo part of photosynthesis, or the light dependent reactions in chloroplasts. Light dependent reactions require the presence of light to function, so that this light can be taken to create ATP and to reduce NADP+ to NADPH. Consequently, light dependent reactions shut down in the absence of light, thereby stopping the production of ATP and NADPH (Sadava et al. 2012). With this information, an experimental hypothesis can be formed that the presence of light will cause the redox activity of the spinach chloroplasts to increase, while the absence of light will cause this activity to decrease. One possible null hypothesis could be that there will be no significant difference in redox activity between spinach chloroplasts that are under light and in the dark. Therefore, the alternative hypothesis must be that there will be a difference in this activity between the two groups of chloroplasts. To test these hypotheses, chloroplasts were extracted from spinach leaves in order to create enriched chloroplasts, which were a vital…

    • 1619 Words
    • 7 Pages
    Good Essays
  • Better Essays

    Photosynthesis Lab

    • 1875 Words
    • 8 Pages

    plant is receiving the most light in order to perform photosynthesis at a more optimal rate.…

    • 1875 Words
    • 8 Pages
    Better Essays
  • Better Essays

    Figure 2. The rate of photosynthesis in elodea plants with different color light filters which include clear, red, blue, and green. The color that produced the highest rate of photosynthesis was clear at .48, then red at .28, and finally green at…

    • 1719 Words
    • 7 Pages
    Better Essays
  • Good Essays

    Lab 5

    • 757 Words
    • 3 Pages

    3. Chlorophyll b absorbs mainly blue and orange light. It broadens the range of light that a plant can use by conveying absorbed energy into chlorophyll a which then puts the energy to work in light spectrums.…

    • 757 Words
    • 3 Pages
    Good Essays
  • Good Essays

    The rate of photosynthesis is affected by environmental factors like light intensity, light wavelength, and temperature. This experiment will test the effect of light intensity on the rate of photosynthesis in a plant called Elodea. Elodea is an easy plant to use for this experiment because it is cheap, abundant, and easy to take care of. This photosynthetic organism needs to be kept in an aerated freshwater tank. To do this experiment, put the Elodea in a beaker of freshwater. Anchor the Elodea using a small weight like a paperclip so that the plant remains in the same position and up right through the entire experiment. Place the beaker of water containing the Elodea in front of a light bulb. In between the beaker and the light bulb, there should be a separate beaker of water that is used to absorb any heat produced by the light. This way the experiment will not be affected by another environmental factor, temperature. Every thirty seconds for five minutes, count the number of bubbles given off by the Elodea. After the first five minutes, move the beaker containing the Elodea about ten centimeters back and let it stand for two minutes so that it can adjust to the new intensity of the light. Count the bubbles released every thirty seconds for five minutes. Move the Elodea back ten more centimeters, let it adjust for two more minutes, then count the number of bubbles…

    • 633 Words
    • 3 Pages
    Good Essays
  • Good Essays

    The purpose of this experiment is to see how different concentrations of carbon dioxide affect the rate of photosynthesis in spinach leaves.…

    • 722 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Hypothesis: My hypothesis for this experiment, the study of the effects of different wavelengths on leaf pigments, if chlorophyll a absorbs blue-violet light, chlorophyll b absorbs blue light, carotene absorbs blue-green light, and xanthophyll absorbs blue light, then wavelengths of greatest absorption will be 400, 450, 500, and 450 respectively.…

    • 420 Words
    • 2 Pages
    Good Essays
  • Good Essays

    This experiment is concerned with identifying photosynthetic pigments found in spinach plants and determining the spectrum of light each absorbs. By using paper chromatography, different pigments of spinach leaves can be separated. The knowledge gained in this experiment is relevant to understanding how the process of photosynthesis works. A Real-world application for this includes the harvesting of clean energy sources, as scientific advances have led the way to artificial photosynthesis on the path to replace fossil fuels (Nath, 237).…

    • 673 Words
    • 3 Pages
    Good Essays
  • Good Essays

    In this study, we are interested in examining the effects of photosynthesis in spinach leaves in the presence of different light conditions. The light conditions that will be tested are no light, white light and green light. Therefore, we hypothesized that the O2 rate of consumption would occur more in the green light condition and CO2 rate of consumption would occur more in the no light condition.…

    • 632 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    It is a well-known fact that plants need light for nourishment, yet many people are ignorant of the reasons behind this. The biological process by which green plants utilize carbon dioxide, water and sunlight to form their own food is called photosynthesis (unknown). Past research has demonstrated that red and blue rays maximize this process (Rothenburger, 1993). The purpose of this experiment was to examine the effect of several different light sources on plant growth. The Five lights sources studied were incandescent, black, fluorescent, colored, and natural light.…

    • 1126 Words
    • 5 Pages
    Powerful Essays
  • Good Essays

    Chloroplast Lab

    • 503 Words
    • 3 Pages

    DPIP will be used to determine the rate at which the cholorplasts are being reduced. The spectrophotometer will establish the wavelength of light that penitrats the chloroplast solution in turn determining the amount of electrons reduced. In the dark reactions, the spectrophotometer will measure the amount of light passing through a darker solution of DPIP and chloroplasts. In the light reactions, the lighter solution, caused by reduction of the chloroplasts, will allow a larger amount of light to pass through to the photocell of the spectrophotometer. Thus, the spectrophotometer will prove wheter the light or dark reactions affect the rate of photosynthesis in chloroplasts. We will also be using a reference solution made of water, phosphate buffer, and active chloroplasts. The purpose of this solution will be used to set the transmittance level for the experiment. The control solution, which is different than the reference solution, is comprised of water, phosphate buffer, and DPIP. It will be…

    • 503 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Light Reaction Lab

    • 477 Words
    • 2 Pages

    This lab explores the effect of light intensity and light wavelength on photosynthesis. The quantity of energy [ATP] produced will change depending upon on these parameters.…

    • 477 Words
    • 2 Pages
    Good Essays
  • Better Essays

    In this lab, four different types of leaves were tested to see the rate at which each leaf photosynthesized. This lab demonstrates how plants store light, capture light, and use light as energy for reproduction and growth, by photosynthesis. The control in this experiment was spinach, which was tested before any of the other plants were. The other plants that were tested were English Ivy, C4 Plant, and a multicolored plant. Each type of leaf was tested in a sodium bicarbonate solution and a solution of distilled water. It will be shown in the discussion whether the hypothesis made was correct or incorrect. It will be shown in the discussion what could have occurred during the experiment that could have affected the results.…

    • 1761 Words
    • 8 Pages
    Better Essays