Photosynthesis in Pond-Weed Plan The aim of this activity is to investigate one of the factors that affect the rate of photosynthesis in pond-weed. I am trying to find out if the distance of the pond-weed from a lamp will change the rate of photosynthesis. I will measure the rate of photosynthesis by counting the number of bubbles that are released by the stem of the pond-weed when the lamp is shone on it from different distances. What I think will happen is as the pond weed is moved further
Investigating Photosyntesis in Pond Weed Aim: The aim of this experiment is to find out what effects the amount of photosynthesis happening in a pond weed. Introduction: A piece of pondweed will be cut and placed into a test tube containing water and sodium hydrogen carbonate, which is placed inside a beaker containing water. A lamp will be shined on to the pondweed and the amount of bubbles released from the plant will be counted. The lamp will be adjusted to different distances
Photosynthesis is the process by which green-plants use sunlight, carbon dioxide, water & chlorophyll to produce their own food source. This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthesis. Light is the factor that is linked with chlorophyll, a green pigment stored
hydrogen carbonate. I will make sure they stay the same by checking them before each test. I will also do each test three times and make a mean average. I must also thoroughly wash all equipment, after every test. Apparatus · Funnel · Pond weed · Beaker · Water · Measuring cylinder · Stopwatch · Sodium hydrogen carbonate (NaHCO3) Risk Assessment and Safety Precautions There are not many safety precautions that need to be taken into
alignment. Preliminary Experiment Apparatus * Piece of Elodea Canadensis * Bulb * Voltmeter * Test tube * Beaker * Box * Two electrical wires * Stopwatch * Thermometer Method I put a piece of Elodea Canadensis (pond weed) in a test tube and covered it with water. The test tube was then placed in a beaker with a thermometer so that the water stayed the same temperature, this was then placed in a cardboard box with a bulb attached to a voltmeter by the electrical
as this could affect the plants rate of photosynthesis. The wattage was controlled by a transformer and the pond weed was placed inside the box directly under the light bulb and surrounded by foil. To give the plant Carbon Dioxide we added sodium hydrogen carbonate powder (this bubbles to produce Co2 bubbles).To attempt to control the temperature the test tube containing the pond weed (Canadian) was placed in a water bath- the water would absorb some of the heat. The plant was subjected to
The Effect of Wavelength on Photosynthesis Rate Aim: To investigate how different wavelength (colors) of light affect the photosynthetic rate. I will use a pant that is a pond weed called elodea. I will measure the rate of photosynthesis by measuring the amount of o2 given off in bubbles per minuet from the elodea. I will do this by placing the Elodea in a test tube with sodium hydrogen carbonate then I will vary the light wavelength (color) using colored filters and count the number
the first pond weed which we have used I think that was not good pond weed to use for this experiment so we had to change the pond weed for next time to carry out the experiment. First time we could not complete our experiment because of the pond weed we have changed the concentration of potassium sodium carbonate from 1 grams to 1 grams but still it did not work well. From my results I have observed that my results are mixed maybe that’s because at the first time it was fresh pond weed so it needs
Photosynthesis Investigation to find effects of distance of a light source from pond weed has on the amount of oxygen produced Photosynthesis All green plants need to be able to make their own food.They do this by a process called photosynthesis.For photosynthesis to occur they need sunlight energy.This energy is absorbed by a green pigment called chlorophyll,which is mainly found in the leaves.This energy then combinEs with water molecules (from the soil) and carbon dioxide (from the air).Then
experiment takes place we will place the pond weed (which has been in darkness for at least 24 hours to stop it any photosynthesis) into the beaker. I will then place the funnel over the pond weed and place the test-tube into the beaker (like the diagram above) I will then fill the beaker up with cold tap water till it covers the bottom of the test tube (450ml). This is so that we can easily count the oxygen bubbles as they come off the pond weed. Now that the experiment is ready to start
As early as 10,000 BC the human race understood the importance of controlling weeds in an agricultural setting. Weed control began with simple hand weeding, but proved to be extremely inefficient. Innovative means of control were discovered, but many of them were ahead of their time and did not become common practice. Thousands of years later, in 1000 BC, animals were finally domesticated and utilized as a means to improve cropping fields. It was not until the 20th century that pest control practices
patent number. It is therefore treated as a creation of Monsanto, a product of Monsanto’s intelligence and innovation." – Vandana Shiva (Barsamian, 1997) Introduction Monsanto is a Saint Louis Chemical manufacturer that is a major player in the weed killing business. Monsanto has quite a portentous past. They developed and produced the notorious defoliant "Agent Orange" used in the Vietnam War, they invented the controversial recombinant Bovine Growth Hormone (rBGH), and they were the inventors
enough that their little hands could hold. After stuffing their favorite foods into their blankets they journeyed to a beautiful pond about a mile away from the house. There they played and swam for hours on end. Every direction the girls looked flowers of all colors bloomed; mostly black-eyed susans. When the wind blew blew just right, the trees would sway over the pond creating ripples in the water. The beach was covered with pebbles. The sound of laughter was everywhere. One of the neighbors had
The Bag of Weed "Come on, it's just one hit, no one will ever find out." We all gathered around the pipe, anxiously awaiting our turn. It was 1:00 in the morning and everyone was asleep, including the dean, or so we thought. Earlier that morning, a friend came up to me excitedly announcing her purchase. She had gotten a bag of weed. I showed a look of approval, not quite caring or knowing what was ahead. I soon would be part of that deal, but at a much higher price. After the evening activities
Police interview tape played This morning, jurors in the case viewed the girl's videotaped interview with police. During the interview, which lasted about 90 minutes, the girl detailed the alleged incidents with Groves. Yesterday, jurors heard from her in person. Student testifies teacher chats led to 'sexual stuff' Ex-Woodstock educator on trial for assault charges By CHRIS REINOLDS Atlanta Journal-Constitution Staff Writer Students gravitated to the classroom of Woodstock High School coach
wastes their money that they use to pay for the expensive pesticides. Pesticides are beneficial to farmers, and are a farmer’s best friend. The pesticides take care of weeds, pests, and diseases. Pesticides kill the weeds, diseases, and pests. They are a farmer’s right hand man because it saves them from having to go out and pull weeds by hand. The pesticide business is a fifty million dollar business (Pros and Cons of Pesticides). I think pesticides are a great thing because they save people’s lives
Introduction Allelopathy is when one plant causes a deleterious effect on another plant through the escape of allelopathic chemicals. Allelopathy can be used for protection from infections of fungal or bacterial organism, and/or can be a form of competition. Moreover, this form of competition could be used for succession or resource management. In this laboratory experiment, wheat (Triticum sp.) seeds were exposed to extracts from four plant species to determine whether or not these species processes
profusely and in the past has been loved by many for its ornamental value. More recently it is drawing attention to itself for outcompeting native species and altering the landscape of wetlands throughout the world. In examining this perennial herb, turned weed, we will learn where it came from, where it grows and the impact it has had on North American ecosystems. We will also review control methods, both successful and unsuccessful. Origin and Description Lythrum salicaria is a part of the family of Lythraceae
Buckthorn an Invasive Plant Species As we all know invasive plants species are living things that harm the environment somehow. “Invasive plant species are always posing a threat by disturbing the natural order of Ecosystems. Rhamnus Cathartica, otherwise known as Cathartic Buckthorn is native to Europe and was first brought to Minnesota in the mid-1800's as a hedging material. There are two main species: Common Buckthorn and Glossy Buckthorn. Buckthorn is commonly a problem to wildlife habitat
Horny Goat Weed One major issue in the world today is sexuality. Do I look good enough? I wonder if he or she likes me? While most of the world today is becoming increasingly sexually active, there are others are out there who are lacking in this field. Their bodies are no longer inclined to have or sex, or their sexual drive loses the battle between time and fatigue. Horny Goat Weed is said to be the cure of this "problem." Horny Goat Weed, also known as Epimedium, Yin Yang Huo, Inyokaku, and