pondweed photosynthesis experiment

However, Cook and Urmi-König (1985), in the latest revision of the genus, recognize five species of Elodea, all of them from the New World: E. potamogeton (Bert) Espinosa and E. callitrichoides (Rich.) (This information can be used later to write a short introduction to your experiment). Known for its bright green color and leafy stems, E. densais an excellent oxygenating plant, making it perfect for use in fresh… Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pond weed. The word equation for photosynthesis is: Carbon Dioxide + Water = Glucose + Oxygen + Energy Pond-weed is being used fro this experiment because with a normal plant that does not live in water it would be a lot more difficult to In experiments using eg Canadian pondweed, you can immerse the green weed in sodium hydrogencarbonate solution to supply the carbon dioxide (one variable) needed for photosynthesis. itzel_celeste_lara. OTHER SETS BY THIS CREATOR. Photosynthesis experiment... an example of a common experiment used to investigate light intensity and the rate of photosynthesis is the pond weed experiment. Quiz 6 Econ 400. Animals depend on plants for food and to convert carbon dioxide into oxygen. Pondweed or Elodia is an aquatic plant typically used to measure the rate of photosynthesis. It gets this from the light which shines on it. allisonmonie. MeGustaMuchos. Introduction Photosynthesis is the process of using sunlight energy and chlorophyll to produce glucose from carbon dioxide and water.Photosynthesis occurs in the chloroplast. For more detail on the set-up of this experiment, watch our high-quality required practical tutorial on YouTube. This traditional experiment on the rates of photosynthsesis in aquatic plants compares three common species. The affect of light on photosynthesis can be investigated using the experimental setup shown. If pondweed is not available I give them sample results or use an online virtual experiment. Photosynthesis in Ponds Plants in water need to photosynthesise just like those on land. Oxygen gas (O 2) is a byproduct of this reaction. Egeria densa, also known as Elodea densa because of its previously incorrect classification in the Elodea genus, is the most popular aquatic plant used to teach photosynthesis in the classroom. 4. Notes on Taxonomy and Nomenclature Top of page. Bio 110 Lab Practical 2 - Guide 2. 1. Place the tube in a beaker of fresh water. Rates of photosynthesis can be slower in water, however, as the levels carbon dioxide dissolved in the water can be variable. The worksheet includes a diagram, method, results table, questions and a quiz. Leave for five minutes for the pondweed to acclimatise to the new light intensity. Historically there has been much confusion in the classification of the species of the genus Elodea (Family Hydrocharitaceae). Botany Exam #2 (Photosynthesis) 30 terms. In this process, plants use the sun, carbon dioxide and water to create food energy. ctansil1. Objective: To measure the rate of photosynthesis at varying light intensities. Lesson organisation The work could be carried out individually or in groups of up to 3 students (counter, timekeeper and scribe). textbooks, websites and reviews. De-starch a potted plant by putting it in complete darkness for two days. Place a pond weed Elodea upside in a test tube containing water at 25°C. For a plant to photosynthesize, it needs carbon dioxide and water and sunlight, a factor of photosynthesis. Practical - investigation of factors affecting photosynthesis. 1. Photosynthesis is a chemical reaction that’s vital to most life on Earth. If you look closely, you will see oxygen bubbles being produced from the cut end of the stem and this will tell you how quickly photosynthesis is happening. First, conduct some research on abiotic factors that can affect the rate of photosynthesis in pondweed. The animation below describes an experiment to investigate the effects of light on photosynthesis. Photosynthesis Experiment Pondweed Investigation of the rate of photosynthesis of pondweedResearch question: How does the concentration of sodium bicarbonate relate to the amount of oxygen produced by Elodea (Canadian pond weed) in the process of photosynthesis?Hypothesis: If there is an increase in concentration of sodium bicarbonate the amount of oxygen produced will increase … Oxygen bubbles are given off by the plant in response to photosynthesis. Lab - Photosynthesis. It is very difficult for us to obtain this plant in Kingdom. There are 3 other potential variables you could test with this simulation: amount of carbon dioxide, light intensity, and temperature. Lab Test. Maintain the room temperature at 20°C. Place excess sodium bicarbonate (NaHCO3) in the water to give a constant saturated solution of CO2. Count the number of bubbles given off in one minute. Pondweed will photosynthesise in water - it is put in fish tanks to make sure there is enough oxygen for the fish. This activity is a lab where students design an experiment to test the rate of photosynthesis. Set up the apparatus as in the diagram. Pondweed (Elodea) Lab. Biology Coursework: Photosynthesis The aim of the experiment was to investigate a factor that would affect the rate of photosynthesis in a Canadian pondweed plant. In this experiment, we were testing the rate of photosynthesis in elodea. 55 terms. The distance is then varied (e.g. While performing the experiment, the piece of pondweed did not photosynthesize at a steady rate, even when the distance from the plant to the light source was kept a constant. Insert about half of the portion of a leaf of the de-starched plant into the bottle through the split cork (Fig. Place the lamp (the only light source) at a fixed distance from the plant. 20 terms. Therefore you will conduct this practical on line. 36). Setting Up the Experiment 1. It is easily available from aquarium shops and science suppliers. Basically, temperature does not pose an enormous effect on the rate of photosynthesis individually; it only affects the speed of the process by affecting the rhythm of … In order for us to measure the rate of photosynthesis, we needed to … Photosynthesis is a simulation of the classic pondweed experiment. 2. 38 terms. ctansil1. Fill partly a wide-mouthed bottle with strong solution of caustic potash and fit a split cork on its mouth. pond weed needs energy. In this experiment, the light intensity is changed, by decreasing the light intensity. In this experiment the rate of photosynthesis is measured by counting the number of bubbles rising from the cut end of a piece of Elodea or Cabomba. The second reading at 8 cm was far greater than the first reading at 8 cm. Mrs Peers-Dent shows you how to measure the rate of photosynthesis of pondweed. Red light is more easily used by the pond weed than most other colours. Materials: Elodea sprigs Test tube and beaker Razor/scissors Water with Sodium Bicarbonate (baking soda) Light source (lamp) Ruler Procedure: PART A. Pond weed uses the carbon dioxide which is dissolved in the water it is in. This process of making sugar and oxygen is called photosynthesis. 16 terms. Hypothesis I think that if the light intensity is very low, then the number of bubbles of oxygen produced will also be very low, Originally from Brazil, E. densa has spread to temperate regions on all of the continents except Antarctica. 20 terms. This pondweed is widely recommended for photosynthesis experiments, as it can be used for demonstrating oxygen formation during photosynthesis. It can be also be adapted easily for different abilities or for GCSE. Use a variety of sources of information e.g. Experiment. Quiz 7 Econ 400. In photosynthesis, plants use energy from the sun, water, and carbon dioxide (CO 2) from the air to store carbon and energy in the form of glucose molecules. morganwasham. This activity will allow students to measure the rate at which the photosynthesis process occurs. A water plant such as Elodea pond weed or Cabomba pond weed is placed upside in a test tube containing water. Obtain a …

Make sure to include information such as the color of light, light intensity,

We have also provided a PowerPoint presentation and notes on pondweed physiology. 100cm, 80cm, 60cm, 40cm, 20cm) and the experiment repeated. At any given point in this experiment, the number of floating leaf disks is an indirect measurement of the net rate of photosynthesis. Photosynthesis required practical variables: Independent variable: Distance of the plant from the light source (light intensity) The purpose of this experiment is to determine the effect of temperature on the photosynthesis of pondweed plant. The other two photosynthesis rate variables are temperature and light intensity. Experiments about photosynthesis … put a piece of pondweed into a test tube of water shone light from a lamp with a red light bulb onto the pondweed counted the bubbles of gas produced by the pondweed every minute for three minutes. Canadian pondweed is used because it has an unusual quality of giving off bubbles of oxygen from a cut end and it’s easy to see and monitor / count the bubbles in water. A worksheet made for a key stage three class about investigating photosynthesis using pondweed. Hazards Tripping Shocks Slipping Concussion Elodea Results My results prove my original hypothesis to be correct When the distance from the light source and the pondweed increased the rate of oxygen production decreases, therefore the more higher the light intensity the greater Experiment Ideas for Photosynthesis. The rate of photosynthesis should decrease and therefore the amount of oxygen bubbles should decrease. 3. Photosynthesis By measuring the rate at which pond weed gives off oxygen bubbles with varying light intensity, It is possible to measure the rate at which photosynthesis is occurring. The pupils repeated their experiment using a blue light bulb, a green light bulb and a yellow light bulb. 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