Plant Lab Report

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Introduction Acid rain refers to a phenomenon in which "[precipitation] from the atmosphere [contains] higher than normal amounts of nitric and sulfuric acids". The precipitation that results in acid rain comes from the pollution emitted by human activities, such as factories, electrical power plants and automobiles. Two main pollutants are sulfur dioxide (SO2) and nitrogen dioxide (NO2), which reacts with substances in the atmosphere, such as water and oxygen, to form acid rain. While rain water has a pH of 5.6, acid rain has a pH of 5 or less, which is acidic enough to harm plant life. Due to the reactivity of acid rain, the cell processes of plants are disrupted, and the cells die or become unable to function properly. Although this greatly damages ecosystems, this environmental issue brings concern to society. Today, with our growing population of more than 7 billion, humans have become hugely dependant on agriculture. As such, acid rain has the potential to damage crops extensively, and thus, damage society as well through shortage of food or even famine. In addition, in countries that depend on the production of agricultural goods like Canada, the effects of acid rain can be tremendous. In this lab, we have chosen to examine the effects of acidic and basic environments on radish plants (Raphanus sativus), by implementing varying pH levels of buffer solution into the soil. We have allotted a total of four days (Tuesday, April 10, 2012- Friday April 13, 2012) to examine the effects of acid rain. Purpose: To investigate the effect of implementing buffer solutions of varying pH levels in soil on the growth in height of radish plants (Raphanus sativus). Independent Variable: The varying levels of pH of buffer solutions placed into the plants' soil Dependent Variable: The height of the radish plants from the base to the tip of plant Controlled

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