The graph should show an increase in arbitrary units the further away from the light source the beaker is because the greater the distance from the light source, the lower the light intensity and so less photosynthesis would take place in the algal balls. The leaves of american pondweed are attached to a stem that can grow up to 6 feet long. Rates of photosynthesis gcse science required practical. The best solution for claspingleaf pondweed control is using our dock and swim area products.
The plants database includes the following 68 species of potamogeton. Floating, ovalshaped leaves are 4 to 7 inches long and 1 to 2 inches wide, while the less abundant, submerged leaves are smaller and bladelike. The bubbles from the pondweed can be counted and the rate of bubbling can serve as an indication of the rate of photosynthesis, or the gas can be collected in a pipette or microsyringe and the amount measured. Likelihood is rated as very unlikely, unlikely, moderately likely, likely or very likely. Rates of photosynthesis can be slower in water, however, as the levels carbon dioxide dissolved in the water can be variable. It probably was accidentally introduced to the state when common carp were intentionally brought to minnesota. Photosynthesis in ponds british ecological society. A read is counted each time someone views a publication summary such as the title, abstract, and list of. Video demo photosynthesis and respiration with cabomba. Claspingleaf tips will come to a point while curlyleaf tips will be blunt and rounded. Photosynthesis water weed simulator lab by arnika rahman on prezi. 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. Elodea is the most abundant of the river macrophytes and at times creates a nuisance for users. Name the variables which affect the rate of photosynthesis in plants.
Virtual experiments have been recorded at reading in physics and in other areas of science. 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. Provide alternate content for browsers that do not support scripting or for those that have scripting disabled. Demonstrating oxygen evolution during photosynthesis using pondweed. Place lamp 5 cm from the test tube with the elodea plant. Demonstrating oxygen formation during photosynthesis can be a tricky process. Watching gas bubble up from a pondweed as it photosynthesises can be a great demonstration or student practical. Water some sort of carbon dioxide indicator such as bicarbonate indicator. It was accidentally introduced to united states waters in the mid1880s by hobbyists who used it as an aquarium plant. Water weed simulation in this simulation, you will be looking at the production of oxygen as a plant photosynthesizes. Put some elodea or a chlorella culture in a flask of. Factors affecting the rate of photosynthesis pass my exams. Pondweed refers to many species and genera of aquatic plants and green algae.
This traditional experiment on the rates of photosynthsesis in aquatic plants compares three common species. Claspingleaf pondweed can sometimes be confused with curlyleaf pondweed. Practicals, animations and more for secondary and post16 biology. An illustrated flora of the northern united states, canada and the british possessions. American pondweed is highly utilized as food by ducks and some other types of wildlife. As cabomba caroliniana is no longer available in the uk, we have filmed a new video that will help you ensure the best results with any pondweed species.
Pdf mitochondrial electron transport protects floating leaves of. Video demo photosynthesis with bubbling pondweed teaching. Submerged portions of all aquatic plants provide habitats for many micro and macro invertebrates. Photosynthesis is the chemical change by which plants use carbon dioxide and water, with the aid of sunlight, to make glucose and oxygen. Computer aided pest risk analysis capra software package which is a similar tool used by eppo for risk assessment. Factors affecting photosynthesis javascript html5 applet. Confidence is rated as low, medium, high or very high. Investigating photosynthesis with bubbling pondweed. If not, you can purchase it from a school supplier. Curlyleaf pondweed potamogeton crispus is an invasive aquatic perennial native to eurasia, africa, and australia. Experiment on how the light intensity affects the rate of. In this simulation, you will be looking at the production of oxygen as a plant photosynthesizes. Students can investigate the effects of either light intensity or the wavelength colour of light on photosynthesis.
Photosynthesis awardwinning science software for schools. One common way is to gather bubbles of gas given off by an aquatic plant. Video demo photosynthesis and respiration with cabomba pondweed. How do abiotic factors influence the rate of photosynthesis. Investigating the rate of oxygen production in pondweed prezi. It is very difficult for us to obtain this plant in kingdom. See more ideas about photosynthesis, plant science and biology. Virtual experiments at reading university university of reading. May, 2014 as cabomba caroliniana is no longer available in the uk, we have filmed a new video that will help you ensure the best results with any pondweed species. For photosynthesis to occur, a plant needs sunlight, water and carbon dioxide.
Demonstrating oxygen evolution during photosynthesis using. Examining elodea pondweed under a compound microscope. The setup probably the best system i can devise sitting at home in front of the computer screen. In the first section experiments most suitable for schools are listed, following this are experiments more suited to higher levels. Noting the basic point subjects similarities basic essay is the differences big essay using block organization format of that blockbyblock. Photosynthesis is a simulation of the classic pondweed experiment. Pondweed simulation amazing world of science with mr. A water plant such as elodea pond weed or cabomba pond weed is placed upside in a test tube containing water. The repertoire of ves is constantly being increased. Find highquality stock photos that you wont find anywhere else. Science investigations 1 by focus educational software. Develop an experiment to test how the level of co2 affects the rate of photosynthesis. Elodea is a genus of submerged aquatic plants used in aquariums.
Thousands of new, highquality pictures added every day. Cyclosis or cytoplasmic streaming can be easily seen in cells of canadian pondweed. Curlyleaf has been in minnesota so long that most people do not realize that it is a nonnative species. Photosynthesis water weed simulator lab by arnika rahman on. Pondweed definition is any of a genus potamogeton of the family potamogetonaceae, the pondweed family of aquatic plants with jointed usually rooting stems, floating or. Photosynthesis factors affecting rate experiment design. Interpretation of results 1 why must you wait two minutes before counting the bubbles. The animation below describes an experiment to investigate the effects of light on photosynthesis. Find pondweed stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection.
American pondweed can be removed by raking or seining it from the pond, but will reestablish from any remaining roots and seeds. Product videos award winning science software for schools. In an experiment, which is investigating the affect of an abiotic factor on photosynthesis, all the biotic factors like the type of the plant should be kept same. Our experimental results establish that floating leaves possess better photosynthetic efficiency. Jul 04, 2014 pondweed photosynthesis experiment risk assessment click to order essay sourcing research paper art, children, expat, family foreign foreign service essay prompt prompts could be the stranger scholarship, students will be on officer language rarely work. If bubbles fail to appear, cut off more of the stem and recrush. These free chemistry simulation software let you learn the molecular models of different compounds. Oxygen bubbles are given off by the plant in response to photosynthesis. Mrs peersdent shows you how to measure the rate of photosynthesis of pondweed. When placed closer to a light source, the rate of bubbling will speed up, and as the pondweed is taken further away, the bubbles will slow down again an instant and visual indicator of the importance of light intensity in photosynthesis. Using water snails and pond weed to investigate the carbon cycle.
This teaching resource introduces cabomba, a pondweed which is much more effective than the traditional elodea. This is an example of a common experiment used to investigate light intensity and the rate of photosynthesis. Chemical reactions gives you over 150 animations of chemical reactions. Pondweed or elodia is an aquatic plant typically used to measure the rate of photosynthesis. Video demo photosynthesis with bubbling pondweed youtube.
Time minutes to ensure a fair and accurate test, time has to be kept constant while making measurements. There is a diverse macrophyte assemblage in the river consisting of several species of pondweed e. Investigation on how light intensity affects the rate of. Photosynthesis in ponds plants in water need to photosynthesise just like those on land. The easiest way to tell the two species apart is to look at the tips of the leaves. The affect of light on photosynthesis can be investigated using the experimental setup shown. This oxygen comes out of the plant and can be seen as bubbles in the water around the pond weed.
Plants profile for potamogeton pusillus small pondweed. The effect of temperature on photosynthetic rate of elodea. Dec 02, 2014 pondweed photosynthesis experiment risk assessment next essay cable kind of free argumentative essay convincing the elements to open new universities in cultural view. Like other green plants, pond weed can make sugar from carbon dioxide and water. After one minute, count and record the number of oxygen bubbles rising from the cut end of the stem. Elodea pondweed experiments on microscopes 4 schools. Experiment on how the light intensity affects the rate of photosynthesis in a pondweed. Available as a windows software program or online resource. This is a much more reliable version of the practical than the frequently used elodea pondweed. Photosynthesis of the simulation of the classic pondweed. Counting the bubbles helps determine the rate of photosynthesis. To allow the pondweed to adjust to the new conditions and make sure oxygen is bubbling out, not just filling a gap in the stem. Controlling curlyleaf pondweed populations in lake george.
You can also learn how chemical reactions take place. Jun 19, 2007 so the alternative hypothesis if you think there will be a decrease in photosynthesis as light intensity increseases predicts that the mean amount of photosynthesis done by the pondweed at light intensity 1 is less than the mean amount of photosynthesis done by the pondweed at light intensity 2 which is less than the mean amount of. Science investigations 1 is an interactive science experiments windows program or online resource for ks3. Pondweed definition is any of a genus potamogeton of the family potamogetonaceae, the pondweed family of aquatic plants with jointed usually rooting stems, floating or submerged leaves, and spikes of greenish flowers. 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. Further thoughts on the experimental methods described in methods 1. This procedure can be accomplished by placing elodea plants in water with baking soda to provide carbon. This traditional experiment on the rates of photosynthsesis in aquatic plants compares three common. Sep 03, 2015 best magic show in the world genius rubiks cube magician americas got talent duration. Here is a list of best free chemistry simulation software for windows. Search from 60 top pondweed pictures and royaltyfree images from istock.
The plant can then be exposed to varying intensities and colors of light. Video clips are shown, with tips on viewing cyclosis with a student microscopeand links to a selection of web resources describing the phenomenom. Investigating the rate of photosynthesis photosynthesis. Photosynthesis practical bubbling pondweed teaching resources. Photosynthesis lab by arnika rahman, adrian chang, pauline tjhin and franisco co2 test prediction light filter test if the light intensity is raised, then more oxygen bubbles will rise up to the top. The 3d molecular structures of different chemical compounds help to learn concepts of chemistry easily. The following experiment demonstrates the balance of carbon dioxide co 2 in a closed ecosystem. Our video demonstrates how best to use this protocol with your students in the lab, which species of pondweed can be used, how to care for pondweeds and a.
Photosynthesis award winning science software for schools. Mar 24, 2015 in this experiment, the relationship between the photosynthesis rate and temperature on elodea is investigated. You can, at last, do virtually all of the experiments in this book on any. Elodea canadensis is a species that works well for this activity, because it has thin, straight leaves.
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