Effect light intensity on photsynthesis elodea

Elodea Photosynthesis Lab

From this experiment, I can see that there is a significant variation in the effectiveness of different wavelengths of light upon photosynthetic rate.

Let our professionals create one just for you. Here are my averaged data results. Glass equipment could break; Use plastic utensils or handle all equipment safely and with caution; I believe that my hypothesis was valid based on my results, excluding the 20cm measurement.

This is just a sample from a fellow student. One method of doing this is to cut the graduated portion from the tube of a plastic teat pipette, fill the tube with water, plug the smaller hole with plasticine or blu-tack and invert the tube over the bubbling stem.

This is a very important aspect of photosynthesis. If any one of these things is in short supply, then photosynthesis cannot happen.

Then it will start decreasing and be very low almost 0 through the nm green light and then it will increase again peaking at about nm red and yellow light. This explains why the Elodea plants are green.

The rate was measured by determining the change in oxygen concentration in the medium by the aquatic plant, Elodea canadensis.

Investigating factors affecting the rate of photosynthesis

Chlorophyll is a pigment in the chloroplast of the plant cell that absorbs energy from light and uses it to create compounds needed in photosynthesis. The increases in bubbling gas production as the light source is moved closer to the plants indicate that the rate of oxygen production by the photosynthesis is affected by the intensity of the light source.

As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis. I did 3 experiments so altogether I collected 9 results for every colour so I added all the 9 results and divided the outcome by 9.

Click Here to return to the search form. However, this is what the table should look like: Check the weed to see if it is bubbling. Update From the comments below, there seems to be some confusion about what exact indicator is used in this experiment. Place a stand next to each container; attach a watt light bulb to each stand 20 cm above each container.

This is an example of how increasing one factor sunlight can lead to another factor water being limiting. The above is the method I used for my first set of experiment.

From the observations and tests made a data table will be generated and results displayed in the form of a graph. Cutting the pondweed underwater. The results from my very first experiment were unsuccessful. Make sure that each piece looks healthy and has plenty of green leaves.

Initially I decided to measure the ph of water after 5 days but the results were not successful as you can see in my results table. Number of oxygen bubbles produced Controlled variable: Thus, the more photosynthetic activity, the less acidic and more blue the bromothymol blue solution becomes as the plant uses carbon dioxide during photosynthesis.

I predict that the plant under blue and purple light will have a higher photosynthetic rate because according to the colour spectrum, they are of shorter wavelength thus they have a higher energy.

Plants use carbon dioxide and produce oxygen gas during photosynthesis. Oxygen is a waste product.

Investigating the effect of light intensity on the rate of photosynthesis of Elodea

At greater intensities oxygen inhibition begins to occur due to the ability of the enzyme ribulose phosphatase to act in both photosynthesis and cellular respiration. The purpose of this experiment is to find out under what wavelength different colour of light the elodea plants are able to grow and photosynthesise the best.

From the results that I collected in my log book for my second method it can be seen that the number of bubbles on the leaves of the plants generally decreased each day as the days passed. You can develop more accurate measures by collecting the gas produced and measuring the volume of gas produced each minute or over longer time periods.

I am not sure what you mean by "level" of light, but I will answer your question in to ways - in terms of the intensity of light and wavelength of light. Photosynthesis needs water, carbon dioxide, chlorophyll, light, and the right temperature. Light intensity directly affects the light-dependent reaction in photosynthesis and indirectly affects the light-independent reaction.

Light is a limiting factor when the light intensity is too low to allow the light -dependent reaction to proceed at its maximum rate. LAB 2: Experiments in Carbohydrates Photosynthesis – light intensity and color effects Photosynthesis is as the heart of almost all terrestrial ecosystems.

It the process evolved in plants, to harness the energy from the sun and to use it to fix carbon. The effect of colored light on the rate of photosynthesis in elodea 1. Repeat the same. Oct 24,  · The research aspect of this science fair project is to assess how light intensity affects the rate at which photosynthesis occurs and the rate of oxygen production.

The project investigator will place a sprig of elodea (underwater) plant under a clear funnel then fill a test tube with water and it placed on top of the funnel/5(16).

- Determining the Effect of Light Intensity on Photosynthesis Aim In this experiment, I intend to alter the light intensity and measure its effect on photosynthesis through the production of oxygen Introduction Photosynthesis is the process by which green plants provide a source of energy for respiration.

10/1/12 the elodea in a flask and the lamp producing. Transcript of Effects of Light-intensity on the rate of Photosynthesis Preliminary Lab.

then the levels of carbon dioxide would decrease. Amount of Baking Soda Dissolved Oxygen (%) Light Intensity (lux) Carbon Dioxide (ppm).

Effect light intensity on photsynthesis elodea
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Investigating factors affecting the rate of photosynthesis | Nuffield Foundation