The effect of light intensity on photosynthesis can be investigated in water plants. Use Cabomba or Elodea
What is the gas evolved in bubbling pond weed in the light?
Answer: The gas that evolves in the bubbling pond weed in the presence of light or the sunlight to be precise, is oxygen gas which evolves due to the process known as photosynthesis that takes place among the plants to breathe and make their food.
What gas does pond weed produce?
Pond weed uses the carbon dioxide which is dissolved in the water it is in. The amount of dissolved carbon dioxide can be varied by adding sodium hydrogen carbonate (carbon dioxide solution) to the water. Many other plants take carbon dioxide from the air.
Does pond weed produce oxygen?
Through the water surface by diffusion. Especially water which is moved by wind and rain absorbs much oxygen from the atmosphere. By growing underwater plants. Especially so-called oxygen producing plants (waterweed, hornwort and pond weed) can produce huge amounts of oxygen under favourable circumstances .
What is pond weed used for?
Cape pondweed, or water hawthorn (Aponogeton distachyos), of the family Aponogetonaceae, is native to South Africa and is grown as an ornamental in pools and greenhouses. Many species of those families serve as food for waterfowl and as cover for fishes .
Is carbon dioxide a gas?
Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure . Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO 2 ) is made up of one carbon atom and two oxygen atoms.
What gas does elodea release?
They produce carbon dioxide during cellular respiration.
What are the bubbles produced in photosynthesis?
In photosynthesis of submerse water plants Oxygen emission occurs in form of bubbles which are released from the stomata or small openings caused by injuries. Usually the oxygen discharge is in form of regular bubble series.
What is the pond weed experiment?
Position the boiling tube so that the pondweed is 10 cm away from the light source. Allow the boiling tube to stand for five minutes. Count the number of bubbles emerging from the cut end of the stems in one minute. Repeat the count five times and record your results.
What type of reaction is photosynthesis?
Photosynthesis is an endothermic reaction . This means it cannot occur without energy (from the Sun). The light required is absorbed by a green pigment called chlorophyll in the leaves.
Why do ponds oxygenate?
Adding oxygen to a fishpond is very important to fish health . This is particularly true in summer months and if the pond is heavily stocked. But even in ponds without fish an air pump will help keep the water fresh – particularly if a waterfall or fountain is not present.
What produces the most oxygen?
At least half of Earth's oxygen comes from the ocean .
Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize.
How oxygen is evolved during photosynthesis?
Photosynthetic oxygen evolution is the fundamental process by which oxygen is generated in earth's biosphere. ... It utilizes the energy of light to split a water molecule into its protons and electrons for photosynthesis . Free oxygen, generated as a by-product of this reaction, is released into the atmosphere.
What solution was the pond weed placed in to provide it with a source of carbon dioxide?
Sodium hydrogencarbonate solution releases carbon dioxide gas for the pondweed. This is the method used. 1. Place the pondweed at 5 cm from the light source.
What is the role of KOH in photosynthesis experiment?
– The Potassium Hydroxide (KOH) absorbs carbon dioxide which is necessary for photosynthesis.
Why is pond water used in photosynthesis experiment?
Why pond water only should be used for this experiment? Ans. Pond water is a source of Co2 for these plants . Carbonates and bicarbonates present in pond water are absorbed through the leaves of these aquatic plants works as a source of Co2 for their photosynthesis.
