I) Research Question: To what extent does light effect the rate of photosynthesis in green spinach leaves? II) Hypothesis: If the leaf is exposed to light in the presence of a Carbon source, then the leaf disks float to the surface of the solution due to an increased rate of Oxygen (O2) production through photosynthesis. III) Hypothesis Explanation: when light is absorbed by leaf pigments such as chlorophyll A or B, electrons within each photosystem are boosted to a higher energy level. Leafs then produce Adenosine Triphosphate (ATP) to reduce NADPH (ferredoxin), and incorporate Carbon dioxide (CO2) into organic molecules in a process called carbon fixation. When leaves are put in the water and undergo the process of the light-dependent reaction,
Title Which frequencies and type of light aided and affected the efficiency of photosynthesis or carbon dioxide consumption in a spinach leaf? Purpose The purpose of the experiment/lab was to observe the effectiveness of different lights during the process of photosynthesis. Background Photosynthesis is a biological process. It occurs in plants, algae and specified bacteria (prokaryotes). Photosynthesis is the process where plants, algae, and bacteria convert light energy into chemical energy.
Purpose: The purpose of this experiment is to see how long it takes for the 10 spinach leaf discs to undergo photosynthesis and thereby rise in the two solutions. Hypothesis: All of the leaf discs in the sodium bicarbonate solution should be floating before the discs in plain water because the bicarbonate is a carbon source that will allow photosynthesis to continue. Background: Light is absorbed by leaf pigments (chlorophyll) which makes electrons within a photosystem moved to a higher energy level. The leaves then make ATP, which reduces NADP to NADPH, and add CO2 into organic molecules. 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 experiment is set up the study the effect of different sodium bicarbonate concentrations on the rate of photosynthesis in spinach (Spinacia oleracea). Photosynthesis is the process by which plants and other photoautotrophs synthesize organic compounds from carbon dioxide (Faculty of Science and Horticulture, 2018). Photosynthesis takes place in the chloroplast of a plant cell, where sunlight, water, and carbon dioxide are used in a reaction to produce oxygen and sugar (Reese 2017). In the photosynthesis reaction carbon dioxide is reduced to make sugar and water is oxidized to make oxygen. In this experiment oxygen production is being used to measure the rate of photosynthesis.
Haya Al-Khater Mr. Gurney Biology HL December 1, 2014 The Effect of Light intensity on rate of photosynthesis Research question- How does light intensity affect the rate of photosynthesis in Spinach leaves (Spinacia oleracea)? Hypothesis- My hypothesis is that light intensity and photosynthesis rate have a positive correlation. Meaning that as light intensity increases, photosynthesis rate will increase. This is because as light intensity increase, the rate of light-dependent reactions increase since light dependent reactions use light as an energy source. When light hits the surface of the leaf, it is absorbed by chlorophyll pigments.
These primary sources are converted to electricity, a secondary energy source, which flows through power lines and other transmission infrastructure to your home and business. 7 Types of Renewable Energy Sources 1. Solar Energy One of the first renewable sources of energy is sunlight. It is the reason why life on the planet Earth has flourished and is the one truly renewable source of energy. About 70% of sunlight gets reflected back into the space and we have only 30% of sunlight to meet up our energy demands.
These power plants are used to generate electricity from geothermal energy sources which are within the earth. The power plants used are as a result of the substantial growth and improvement in geothermal energy technology. The cost effectiveness and reliability of such a source allows for geothermal energy to be a prone after solution to the current energy crisis (Wang,
This suggests that the lights which produced heat are less suitable for use with the growth of these plants. The hypothesis was that the heat producing bulbs would make the plants produce more oxygen as they would be photosynthesising more, however the results disprove this idea. A possible reason for this is that the plants used were both aquatic and so are more used to cooler temperatures. Therefore their optimum temperatures for photosynthesis would have been lower than the usual for land plants, suggesting that the warmer temperature reduced their efficiency. (“Aquatic Plants for Freshwater Aquariums”) The results on the graphs are grouped in clusters, each cluster represents the result obtain with the different light bulbs.
Energy is simply the capacity to do work. Energy has become one of the necessities of our modern life. Energy can have many forms like heat, electrical, chemical, nuclear, light, etc. In the pre historic era fuel wood was the major sources of energy. Conventional energy sources are the ones that have been using so far to fulfill most f our daily energy requirements of cooking, lighting, transportation etc.