Aim: How does light intensity affect the rate of photosynthesis in Elodea (pondweed)? Introduction: In this experiment, we were testing the rate of photosynthesis in elodea. For a plant to photosynthesize, it needs carbon dioxide and water and sunlight, a factor of photosynthesis. In order for us to measure the rate of photosynthesis, we needed to measure the products that were made, glucose and oxygen. As oxygen was a visible product, we counted the oxygen bubbles made when we moved the source of light.
Aim To observe the effect of light intensity on the rate of photosynthesis. Hypothesis Light intensity is directly proportional to the rate of photosynthesis. When the light isn’t intense, not many oxygen bubbles will be produced and thus observed. This indicates that the plant will not have enough derived energy from the sun to activate photosynthesis. Whereas, when the light intensity is great, the rate of photosynthesis will be high.
They tested how the temperature would affect the rate of reaction. This was observed by the amount of time it took for the solution to change colors. For many chemical reactions there is an optimum temperature at which the chemicals will react with each other. As was found in their experiment, the temperature affected the rate of reaction. (Deoudes, 2010).
When the leaves go through the process of a light-dependent reaction by being placed in water, oxygen is created through photosynthesis and is released into the interior of the leaf. This causes the leaf to rise. However, since cellular respiration is happening at the same time, the oxygen is also being used up. This means that the leaves must
When it rains, the water runs down the branches and stem and it reaches the roots. The water enters the root and rises through the bark. The bark sucks the water up. The water does not leave the stem again. When a root is cut the water runs out and the plant dies.
If the molecular weight affects the rate of diffusion, then the higher the molecular weight, the slower the rate of diffusion. This was observed in the experiment where diffusion of hydrochloric acid (HCl) and ammonium hydroxide (NH4OH) were tested. In this
Ultraviolet light contains too much energy to properly and consistently assist photosynthesis. This inconsistency is expressed in the initial logger pro data (screenshot/example located 2 pages prior). Every trial of the UV light, showed how the slope would increase until about 2:30 minutes through the 5 minute testing. The slope would then begin to drastically decrease, expressing that photosynthesis was occuring. Photosynthesis is affected by different types of lights and wavelength
The changing of UV irradiance can affect primary production in all ecosystems, terrestrial and aquatic, natural, managed, or exploited with a potential cascade of effects. Current understanding of these processes does not enable confident prediction of the impacts. Chapin, Sala & Huber-Sannwald (Scenario 2013) pointed that “little is known about the effects of increasing UV-B on either biodiversity or ecosystem function”. It is necessary to consider as positive as negative impact of UV radiation on living organisms and
Transpiration is nothing but the the loss of water due to evaporation through tiny pores on the leaf surface. When water is available to the roots they move into the plant through a process called osmosis and this creates a pressure in the root called the hydrostatic root pressure and this pressure forces the water upward but only for a short distance, the rest of the force to push the water up to the leaves is due to transpiration. The water loss is facilitated by the opening and closing of the stomata depending on environmental conditions. A stomata is nothing but the small invisible pores on the leaves. Transpiration is a very important part of the water cycle as it helps in keeping the air moist and this is beneficial to humans.