Ideally, a teacher would have no more than twenty four students to coach through this activity. A student will have prior knowledge as to the equation describing the photosynthetic process as well as having a basic understanding of the scientific method.
Using just three simple ingredients carbon dioxide, water, and sunlight plants and bacteria are able to make their own food. Early forms of algae and bacteria were the first organisms to photosynthesize.
Fortunately for all animals, including humans and fish, oxygen is a by-product of this process. Photosynthesis by algae, bacteria, and plants provides the air that humans breathe.
The Basics of Photosynthesis Without photosynthesis, life as we know it would not be possible In most plants, photosynthesis occurs in special cells known as chloroplasts.
The green hue we see in plants is the result of tiny grains of green pigment light-absorbing molecules inside the chloroplasts. Different types of plants use different forms of chlorophyll for photosynthesis.
Chlorophyll a is the pigment directly responsible for transforming light energy sunlight into chemical energy carbohydrates. Many plants also contain chlorophyll b and chlorophyll c, pigments which help carry out other chemical processes. Aquatic Plants and Photosynthesis Plants, including aquatic plants, produce oxygen, and they also use oxygen.
During a sunny day, dissolved oxygen in water is generally plentiful because photosynthesizing algae and aquatic plants are constantly releasing it into the water.
Even though many other organisms are using the oxygen, there is an oxygen surplus.
1) learn that the rate of photosynthesis is influenced by environmental factors that can be quantified 2) understand the equation of photosynthesis and how the structure of a leaf allows for the required gas exchange to occur through the stomata. There are three main factors affecting photosynthesis and several corollary factors. The three main are: Light irradiance and wavelength; (shading by other plants is a major limitation of photosynthesis), rate at which carbon dioxide can be supplied to the chloroplasts to support photosynthesis. Transpiration - Factors Affecting Rates of Transpiration water does not move through it very easily. The thicker the cuticle layer on a leaf surface, the slower the transpiration rate. Cuticle thickness varies widely among plant species. Very low levels of light at dawn can cause stomata to open so they can access carbon dioxide for.
After sundown, without sunlight, photosynthesis slows considerably, or even stops. So, in addition to the usual oxygen demands from fish, macro-invertebrates, tadpoles, etc.
Too many plants or animals using the oxygen in the system can deplete it and create the potential for a fish killespecially after several days of cloudy weather or low light when less photosynthesis takes place.
Factors that Influence the Rate of Photosynthesis and Oxygen Production in Aquatic Plants Water Color Dissolved substances in the water, such as naturally-occurring tea-colored tannins, can prevent sunlight from penetrating down into the water column.
This is one reason that many red-water or black-water lakes have few submersed plants. These lakes can support emersed or floating-leaved plants which are in direct contact with the sunlight.
Turbidity An abundance of suspended clay, silt, or phytoplankton free-floating algae can also make a lake turbid or murky, which may slow or prevent submersed plant photosynthesis and growth because of low-light conditions. Because of an abundance of algae and suspended sediments in the water that block, scatter or absorb sunlight, submersed plant communities have not been able to re-establish.
Without sufficient soil-anchoring plants on the bottom, sediments continue to be re-suspended by wind and wave action, furthering the turbidity problem. Cloudy Weather Several days of cloudy weather can slow the rate of photosynthesis, resulting in lower oxygen production within a waterbody.
If you have a small fish pond with an aerator, turn it on during cloudy weather. Day Length Fewer daylight hours during autumn and winter also influence photosynthesis, as well as temperature and humidity.
Leaf Characteristics Changes in the condition of a leaf aging, tearing, etc. Leaves on a "sun plant" tend to be smaller and thicker, with more pronounced lobes than shade plant leaves.
Special cells in these leaves allow higher rates of photosynthesis. Their leaves tend to be thinner and longer, with fewer chlorophyll cells, making it easier to photosynthesize under low light conditions.
Differences in Photosynthetic Processes While photosynthesis is similar in both aquatic and terrestrial plants, there are a few important differences. For example, emersed plants, floating-leaved plants, and terrestrial plants extract carbon dioxide from the air, while submersed plants extract it from the water.
Also, submersed plants have a harder time obtaining carbon dioxide C02 from the aquatic environment because it has a lower exchange rate of gases. The diffusion of gases in water is times slower than in air.Factors that Influence the Rate of Photosynthesis and Oxygen Production in Aquatic Plants Water Color Dissolved substances in the water, such as naturally-occurring tea-colored tannins, can prevent sunlight from penetrating down into the water column.
What factors affect the rate of photosynthesis in living leaves? affect the rate of photosynthesis in plants — both physical variables and biotic variables. and experimental design, as illustrated in Table 1. Table 1. Variables Affecting Rate of Photosynthesis Environmental Variables Plant or Leaf Variables Method Variables (These.
Investigating the Factors that Affect the Rate of Photosynthesis Essay - Investigating the Factors that Affect the Rate of Photosynthesis Aim: I will be investigating how light intensity affects the rate of photosynthesis, whether it decreases or increases the rate of .
What factors affect the rate of photosynthesis in living leaves? Background Living systems require free energy and matter to maintain order, to grow, and to reproduce. What Factors Affect the Rate of Photosynthesis in Living Leaves? Sample Essay.
Abstraction: In this lab - What Factors Affect the Rate of Photosynthesis in Living Leaves?Sample Essay introduction. four different types of foliages were tested to see the rate at which each foliage photosynthesized. This lab demonstrates how workss store light.
gaining control visible radiation.
and utilize. Photosynthesis is the process in which light is converted to the chemical energy of sugars. It can be summarized in the following equation.