Photosynthesis in Elodea Lab

Good Essays
Elodea & Photosynthesis

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Introduction
This lab has been created in order to find what extent does distance from a light source (5cm, 10cm, and 15cm) affect the rate of photosynthesis (measured in bubbles / 3 min) in Elodea water plants. Hypothesis: More amount of time under the light will cause the plant to give out more glucose and O2. Also, if the light is closer, the process will be faster. The procedure for this would be to leave the Elodea plant in water with sodium bicarbonate (baking soda increases carbon dioxide in water), set up the lamp at 5cm distance and start the timer for 3 minutes. Overall results are that after 9 minutes (3 minutes intervals between the light distance), the solution gave off 4 bubbles.
Method:
The following materials were required for the experiment:
A green sprig of Elodea
Lamp
Water
Sodium Bicarbonate (baking soda)
Beaker
Pen
Paper
Power source
The following procedures were required for the experiment:
Obtain a green sprig of Elodea. Remove several leaves from around the cut and of the stem. Slice off a portion of the stem at an angle and lightly crush the cut end of the stem.
Place a small pinch of sodium bicarbonate into a test tube (this increases carbon dioxide in water)
Fill the test tube with distilled water so that the stem is completely submersed.
Place the plant into a beaker.
Place a source of light 5cm from plant.
Wait a minute
After one minute, count and record the number of oxygen bubbles rising from the cut end of the stem for 3 minutes. If bubbles fail to appear after one minute, repeat part A.
Run a second 3 minute trail at 10cm from light sources (lamp). Record results.
Run a third 3 minute trail with at a 15cm distance from a light

You May Also Find These Documents Helpful

  • Good Essays

    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.…

    • 722 Words
    • 3 Pages
    Good Essays
  • Good Essays

    The rate of photosynthesis may vary with changes that occur in environmental temperature, wavelength of light, and light intensity. Using a photosynthetic organism of your choice, choose only ONE of the three variables (temperature, wavelength of light, or light intensity) and for this variable.…

    • 633 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    They are complementary process because they both need the same components, water, energy, carbon dioxide, and glucose.…

    • 342 Words
    • 2 Pages
    Satisfactory Essays
  • 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
  • Satisfactory Essays

    Photosynthesis Lab Report

    • 566 Words
    • 3 Pages

    Photosynthesis is a process to which some autotrophs such as plants produce their own food. It has two stages or reactions light-dependent and light-dependent reactions. The light dependent reactions are the first stage, where energy from sunlight is captures in Photosystem 2 and then 1, the electrons generated in Photosystem 1 then moves along the electron transport chain. The moving of electrons causes a hydrogen ion gradient that is used in the final step to produce ATP, by the ATP Synthase. The equation for this reaction is 6CO2 + 6H2O  C6H12O6+6O2 or, carbon dioxide +water sugars + oxygen . This reaction takes place on the thylakoid membrane of the chloroplast and uses energy from sunlight to produce compounds like ATP and NADPH. The second stage of photosynthesis is the Calvin Cycle, which takes place in the stoma of the chloroplast. This stage is light-independent or it does not need energy from sunlight. During this reaction ATP and NADPH from Stage 1are used to produce high energy sugars. The reaction is 3CO2 + 6NADPH + 5H2O + 9ATP  G3P + 2H+ + 6NADP+ + 9ADP + 8Pi . Additionally, the three limiting factors of photosynthesis are the light intensity, carbon dioxide concentration, and the temperature. Lastly, the items used in this particular experiment were baking soda to provide CO2, a light to excite the electrons in stage 1, distilled…

    • 566 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Using the testing equipment, measure the dissolved oxygen level of the room temperature bottle and record it.…

    • 271 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    7. Refill half of the test tube with room temperature distilled water (at least 10C) and add 1/8 teaspoon of salt to the distilled water in the test tube. Mix well…

    • 1713 Words
    • 7 Pages
    Powerful Essays
  • Powerful Essays

    Photosynthesis occurs in all green plants and is the beginning of nearly all food chains therefore a source of life to all living organisms. It is the process where plants transform light energy from the sun into chemical energy. By using light energy trapped by chlorophyll (light absorbing pigment), plants combine carbon dioxide and water to form glucose and oxygen.…

    • 1825 Words
    • 8 Pages
    Powerful Essays
  • Satisfactory Essays

    Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen.…

    • 324 Words
    • 2 Pages
    Satisfactory Essays
  • Better Essays

    As oxygen moved into the early atmosphere, ultraviolet radiation from the sun split the oxygen molecules (O2), which then recombined, producing the Earth’s ozone layer (O3). This, in turn, reduced the amount of incoming ultraviolet radiation striking the Earth. The impact for life on Earth was enormous. With reduced amounts of ultraviolet radiation, organisms moved to shallow water and, ultimately, onto the land.…

    • 921 Words
    • 5 Pages
    Better Essays
  • Powerful Essays

    What conditions of light and CO2 (both colour and intensity) would you suggest this student use to optimize the growth of this water plant?…

    • 1307 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    Chloroplast Lab

    • 503 Words
    • 3 Pages

    3) The chloroplast will be subjected to two experimental conditions- light, and the absence of light, using a spectrophotometer to determine the amount of DPIP reduced at specific time intervals under each condition.…

    • 503 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    In this simulation, you will be looking at the production of carbon dioxide as a plant photosynthesizes. Oxygen is…

    • 553 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Photosynthesis Lab Report

    • 507 Words
    • 3 Pages

    Photosynthesis is a well perceived performance in which plants and other defined organisms use the energy of photons to convert carbon dioxide and water into a simple monosaccharide sugar known as glucose. Photosynthesis provides the fundamental energy source for essentially all living organisms. The most substantial and valuable byproduct of photosynthesis is oxygen, one of the most abundant elements living organisms depend on.…

    • 507 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Basic Lab Measurements

    • 465 Words
    • 2 Pages

    Find a clean burette and fill 45mL worth up with water and record the volume.…

    • 465 Words
    • 2 Pages
    Good Essays