Lab Assignment 6.docx - ASPECTS OF PHOTOSYNTHESIS ABSTRACT...

This preview shows page 1 - 2 out of 7 pages.

ASPECTS OF PHOTOSYNTHESIS ABSTRACT: Different aspects of photosynthesis were observed. The aspects that effect the rate of photosynthesis were observed by conducting three experiments on light intensity, wavelength, and action spectra. A spinach plant was used in the conduction of the three experiments. For light intensity, chloroplasts from the spinach plant along with various amounts of other solutions were used, for wavelength effect, disks of spinach and different colored lights were used to cause the disks to float, and for action spectra, the different pigments contained in the spinach plant were used and the optimal wavelength for the pigments were observed. The results for the light intensity showed that as time went on, the absorbance rate decreased because the rate of photosynthesis increased. The results for wavelength showed that red light was the most effective at producing the most amount of disks to float. The results for the action spectra showed that different pigments were optimal at different wavelengths. In conclusion, light intensity, wavelength, and different pigments affect photosynthetic rate. INTRO: The purpose of this experiment was to examine the different aspects of photosynthesis by conducting the experiments on light intensity, wavelength, and different pigments. An experiment involving the staining of Coleus plants and Lugol’s solution was observed as well. Photosynthesis is the chemical process in which plants and other various organisms use to convert carbon dioxide, water, and sunlight into food for energy. Photosynthesis is important because it is the main source that contributes chemical energy into the world. This process creates oxygen as a waste product, which then can be used by other organisms to preform processes such as aerobic respiration and it is the main producer for ecosystem food webs. Photosynthesis can occur with or without light present as well [Harris-Haller 2016]. Light intensity, wavelength, and action spectra play a key role in the rate of photosynthesis. Light is important because it is a vital source the organism needs to obtain in order for the process of photosynthesis to begin. The intensity of light affects how fast the plant does the process of photosynthesis. Wavelength is important in photosynthesis because each plant has optimal wavelengths that processes photosynthesis best at. Pigments selectively absorb wavelengths of visible light and transmits the other wavelengths. Chlorophyll- is the most ɑ abundant pigment in plants and reflects green which is why plants are green. [Harris-Haller 2016]. Three experiments were conducted to examine the key roles of photosynthesis. The hypothesis for the light intensity experiment was that if the test tube is placed at 24 cm from the light source, then the test tube will produce the lowest absorbance rate due to it being closest to the light source. The null for the light intensity experiment is that placing the test tube at any distance from the light source will not have any affect on the absorbance rate. The hypothesis for

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture