They produce large, slow bubbles. Observe Photosynthesis pondweed elodea sp of photosynthesis Photosynthesis pondweed elodea sp a water plant. Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis.
Light Colour Average Number of bubbles Blue And the number of bubbles on the elodea segment everyday. I repeated the experiment, but this time I decided to remove the watt lamp and instead of measuring the ph of water measure the number of bubbles on each plant everyday and on the fifth day the elodea segments were removed from the container, measured and recorded again to see the amount grown in length during the five-day period.
However, the plants will grow in a wide range of conditions, from very shallow to deep water, and in many sediment types.
Use the type of environmental condition for the horizontal axis. Place the 10 cm segment of elodea plant in each container. In this experiment I use a plant called Elodea pond weed. The plants will release bubbles of oxygen - a product of photosynthesis - which can be counted.
It lives in fresh water. More essays like this: The basic structure of these plants are whirls of leaves around a stem that form a chain of long segments connected to looks like pipe cleaners with usually a diameter of about half an inch or so, depending on the species of elodea plants.
The amount of trapped light energy and the amount of carbon dioxide available affects the rate of photosynthesis.
Remove several leaves from around the cut end of the stem. Plants use green pigments called chlorophylls to trap light energy. The pondweed should be 8 cm long. The red light and green light will have lower photosynthetic rate because red light has a shorter wavelength lower energy and the green light is absorbed by the plants chlorophyll pigment.
When buying from pet stores in particular, the staff may not be able to identify the type of pondweed they are selling but we hope that this guide proves helpful.
Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in The use of these names causes it to be confused with similar-looking plants, like Brazilian elodea Egeria densa or hydrilla Hydrilla verticillata. How does this investigation demonstrate that plants give off oxygen during photosynthesis?
Myriophyllum scabratum note — do not use other Myriophyllum species, as these can be invasive. The pondweed should be cut end uppermost. Elodea often overwinters as an evergreen plant in mild climates like New Zealand. Canadian waterweed Elodea canadensisfor example, has naturalized in AsiaAfrica, Australiaand Europe and is an obstacle to lake navigation in many areas.
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. Using Aquatic Plants to Demonstrate Photosynthesis Candace Berkeley Development Coordinator Introduction Egeria densa, also known as Elodea densa because of its previously incorrect classification in the Elodea genus, is the most popular aquatic plant used to teach photosynthesis in the classroom.
If little oxygen is being given off, photosynthesis is occurring slowly. Available online and from some pet shops and aquarium suppliers.
For each group of four students elodea water plant lamp 40 watt test tube razor blade single-edge dechlorinated water room temperature tape sodium bicarbonate powder baking soda clock or timer metal stand with rod or test tube rack metric ruler Strategy: Slice off a portion of the stem at an angle and lightly crush the cut end of the stem.
This investigation can be performed with water plants grown in many parts of the world, except regions that have permanent ice.
The chlorophylls give a plant its green color. Repeat the experiment at different distances away from the light source.
It is native to North America and is an important part of lake ecosystems. Use Cabomba or Elodea, which are sold in aquarium shops.
The bubbles produced over one minute periods are recorded. This would then allow white light through but making the holes small and on the side of the container will reduce the amount of light through that is not of the colour group.
I did some research on different light wavelengths and found out that the blue light has the lowest wavelength therefore it has more energy followed by purple, green and red.The effect of light intensity on photosynthesis can be investigated in water plants.
Use Cabomba or Elodea, which are sold in aquarium shops. The plants will release bubbles of oxygen - a product.
Elodea is native to North and South America and is also widely used as aquarium vegetation. It lives in fresh water. The introduction of some species of Elodea into waterways in parts of Europe, Australia, Africa, Asia, and New Zealand has created a significant problem and it is Order: Alismatales.
Brazilian elodea (Egeria densa; formerly Elodea densa) and Canadian waterweed are commonly used in schools as an experimental plant for demonstrating cellular structures, such as chloroplasts and nuclei, and oxygen production during photosynthesis. Assemble the equipment needed to measure the rate of photosynthesis in elodea (water plant).
3. Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis.
4. Change the conditions of photosynthesis by altering light intensity and. Oct 03, · A short clip of oxygen bubbles being produced from a photosynthesising aquatic plant.
- The Limiting Effect of Light Intensity on Photosynthesis Aim: To investigate the limiting effect of light intensity on photosynthesis. Prediction: I predict that as the light source (desk lamp) is moved closer to the pondweed (Elodea), the rate of photosynthesis will increase therefore more oxygen will be produced creating more bubbles.Download