My support does support my prediction. Create a bar graph to illustrate your results. They are already widespread but should not be introduced to school ponds. Evaluation and conclusion Overall my experiment went really well. I have controlled all my variables — Input variables was the light intensity, the output variable was the measurements and the control were, the same time, around the same temperature and the direction of the light had to face the same way.
Prediction I predict that with a blue filter the photosynthetic rate will be the highest as blue is a highly absorbent color it also has a short wavelength so carries the most energy. Scale 1 To measure to volume of oxygen released. Which is trapped by the chlorophyll molecules and then oxygen is given off as a bi-product if the process. However, you will have to peel back the aluminium foil to see if the colour therefore reaction has occurred. I will explain what the result are showing and refer to my results table and graph.
Prediction I predict that as the light intensity increases that the rate of photosynthesis will increase in proportion, so for example if you. 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. Green plants contain many tiny structures called Chloroplasts and these contain a chemical called Chlorophyll. I will also look into extra work and how I could carry my experiment on or look at other similar experiments I could look at. Record all data and determine if your data supports or refutes your hypothesis. Some days or even weeks later , a disk is cut out of the other half of the leaf, dried and weighed.
Many plants spread out their leaves in such a way that each leaf maximises the amount of light falling on them and the lower leaves are not shaded by the ones above. It studies the refraction of laser beam through a glass block. Fill test tube with sodium bicarbonate solution. · Time the bubbles for 3 minuets and record the results. Why does grass not grow in the winter? The available mass of carbon dioxide increases with each addition. Aim The aim of my experiment is to find out how light intensity affects the rate of photosynthesis.
There are many other further work I could of done for this experiment apart from changing the distances from the lamp and the measuring cylinder, you can change the light intensity by maybe changing the watts in the light bulb, changing the colour of the light by putting different transparent coloured paper, changing the pondweed by finding a pond weed after every experiment, changing the temperature by using a water bath and heating it to a certain temperature, this would be hard to control. This could give a comparison between several plants. The molecule is made up of a porphyrin ring with several carbon and. Changing the amount of carbon dioxide by adding a certain amount of sodium bicarbonate, and many more but this is all that I can think about. Introduction: Photosynthesis is the process by which green plants use the light energy to convert carbon dioxide and water into simple sugar called glucose, which provides a basic energy source for the plant. Introduction: Photosynthesis is the process by which green plants use light to synthesize from carbon dioxide and water.
Record the data accumulated over five minutes and count the bubbles that rise to the surface. Thus, the more photosynthetic activity, the less acidic and more blue the bromothymol blue solution becomes as the plant uses carbon dioxide during photosynthesis. The light-independent reactions use that energy to make glucose from carbon dioxide and water. Running Head: Constructing Profile Constructing Profile of the of the of the. Any more questions feel free to ask. Form a hypothesis to test your variable. 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.
Fill the boiling tube with 40mls of water. Sometimes cutting 2—3 mm off the end of the weed will induce bubbling from the cut end, or change the size of the bubbles being produced. Then time with a stop clock how many bubbles are produced within a certain length of time at that distance. From the comments below, there seems to be some confusion about what exact indicator is used in this experiment. Increase in mass of the disc is an indication of the extra mass that has been stored in the leaf. I have based this prediction on the fact that the carbon dioxide provides the carbon atoms for the sugar compounds which fuel respiration so the more carbon dioxide the more carbon atoms so the more sugar compounds and the faster the respiration can take place in the photosynthesis process. Materials: 3 Leaves Hole punch Lamp Diluted soap one drop x2 1 X 1 metre Aluminium foil x2 1 X 1 metre Glad wrap x2 300mL water x2 1g of sodium bicarbonate x2 Plastic syringe 10cc or larger Stopwatch Small beaker x2 Variables: Dependent.
I also think that the higher the percentage of carbon dioxide the faster the rate of photosynthesis will occur. Ceratophyllum demersum hornwort A British native species, suitable for growing in a school pond, or in an indoor tank. Starch is the best way to store carbohydrates as it is compact and is easily broken down in the body. My predictions are based on previous year 10 elodea photosynthesis results. This test only works when alcohol is present.