Pondweed photosynthesis

But how can we measure the rates at which photosynthesis takes place? The students can be allocated to investigate a particular factor that affects the rate of photosynthesis, or they can choose from this list, or they can develop their own ideas.

Me Nifty Tricks that Help in Conquest Adaptations Submerged macrophytes or underwater plants have had to overcome several obstacles to be successful. Leave one lamp without a colored film as a control. Egeria najas is an easy growing species from South America.

Check the Elodea to see if it is bubbling. Secure the film with tape. The distance from the bulb to the pondweed. A lamp with Pondweed photosynthesis LED bulb is set up at different distances from the plant in a beaker of water: You can then investigate the amount of gas produced at different distances from a lamp.

Use the same pondweed for each bulb.


Read Pondweed photosynthesis full protocol on how to investigate photosynthesis using pondweed. Place the remaining plants each under a colored lamp. However, with high light levels it will grow rapidly. Compare your results to your hypothesis. There is a total of x tonnes of carbon dioxide in the atmosphere and photosynthesis fixes x tonnes per year.

Record the final color of the bromothymol blue solution for each color of light, as well as both controls. This is a non-native species that can tolerate relatively cold temperatures and low light levels. Measuring the rate of photosynthesis Measuring the rate of photosynthesis Without photosynthesis life as we know it would not exist.

Curly Leaf Pondweed

You could investigate the effect of different wavelengths of light on photosynthesis. What gases are produced by plants during photosynthesis? However, we would not recommend growing this in school ponds, as it is an invasive species that can cause harm to invertebrates and fish.

To maximize light uptake for use in photosynthesis, the leaves of curly leaf pondweed are only a few cells thick with thin membranes.

Light intensity or distance of the Elodea from the lamp. Use similar lamps with the same power output Watts. Plants use carbon dioxide and produce oxygen gas during photosynthesis. As with most methods, you need several plants so you have replicate measurements and you can find an average and a standard deviation if necessary.

Why does grass not grow in the winter? The diagram shows the way the experiment was set up. Count the number of bubbles emerging from the cut end of the stems in one minute. If you harvest several plants and record how much mass they have accumulated you will have an accurate measure of the surplus photosynthesis over and above the respiration that has taken place.

Investigating factors affecting the rate of photosynthesis

The pupils repeated their experiment using a blue light bulb, a green light bulb and a yellow light bulb. That pineapple bacon cheeseburger is making me hungry! During photosynthesis, these plants utilize different organic acids to break down carbon dioxide in order to make essential sugars. The changes in the oxygen concentration in the water could be measured using datalogging equipment.

There is a slight risk of infection from pond water, so take sensible hygiene precautions, cover cuts and wash hands thoroughly after the work is complete. There is less sunshine in the winter. This helps to reduce the loss of important gasses like carbon dioxide, which is an essential molecule for photosynthesis.

Elodea canadensis and Elodea nuttallii. A group of pupils investigated the way in which the colour of light affects photosynthesis. Cabomba caroliniana is no longer available in the EU, due to new regulations on the propagation of invasive species.A brief outline of various ways to measure the rate of photosynthesis - including measuring photosynthesis via the uptake of carbon dioxide (e.g.

using immobilised algae), via the production of oxygen in pondweed, via the increase in dry mass, and via the production of carbohydrates.

Mar 27,  · Plants perform photosynthesis to create sugars and other organic compounds that they need to mi-centre.comphyll is a pigment in the chloroplast of the plant cell that absorbs energy from light and uses it to create compounds needed in mi-centre.come light is made up of different colors of different wavelengths and /5(54).

In this practical experiment, the rate of photosynthesis is measured by counting the number of bubbles rising from the cut end of a piece of Cabomba pondweed. This is a much more reliable version of the practical than the frequently used Elod /5(3). Class practical 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.

Lesson organisation The work could be carried out individually or in groups of up to 3 students (counter, timekeeper and scribe). Demonstrating oxygen formation during photosynthesis can be a tricky process.

One common way is to gather bubbles of gas given off by an aquatic plant. This teaching resource introduces Cabomba, a pondweed which is much more effective than the traditional Elodea.

Reaction: photosynthesis of Canadian pondweed (Elodea) Introduction- what is photosynthesis. The definition of photosynthesis is when plants process water and carbon dioxide to produce glucose by the process of photosynthesis. Photosynthesis is the method that plants use to make their own food.

Pondweed photosynthesis
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