Friday, February 14, 2020

Photosynthesis In Plants Essay Example | Topics and Well Written Essays - 500 words

Photosynthesis In Plants - Essay Example Three leaves of the bouquet were covered by aluminum foil ensuring that the foil was blocking light from the leaves. The foil was removed from one leaf every week, photographed and observed for the three-week period.ResultsIn Figure 1, the leaves were green and healthy. Figure 2 shows leaves that had turned to light green and almost white in color. Vascular bundles were clearly visible in addition to the green spots on the leaf. The color at the center of the leaf was lighter than the periphery. Figure 3 shows leaves that are brown and dried out.DiscussionThe findings indicate that light is necessary for photosynthesis. The leaf in Figure 1 was green and healthy despite being covered by the aluminum foil because the energy in the chloroplast could still sustain photosynthesis. The leaf in Figure 2, was turning light green to indicate minimum photosynthesis was taking place. The leaf in Figure 3 had been covered for a longer period of time and the energy needed for photosynthesis was depleted. Moreover, there was no more light energy that could be absorbed for photosynthesis. This experiment shows that a low light intensity leads to a low rate of photosynthesis. This would deduce that an increased light intensity would lead to a high rate of photosynthesis at an optimum level.ConclusionIn summary, photosynthesis is essential for plants. Therefore water, temperature, light intensity and carbon dioxide should be made available to ensure the survival of plants.

Saturday, February 1, 2020

The Acquisition of Tense by Arabic Learners of English Language Thesis Proposal

The Acquisition of Tense by Arabic Learners of English Language - Thesis Proposal Example This proposal was motivated by an interest in the subject as well as the knowledge that the results of the study are potentially productive and could provide necessary knowledge in the area of linguistic science. This subject is a problem of significance for the students it affects and the knowledge to be gained from this study stands to benefit more than the population of peoples with Arabic as a first language. It is my hope that the findings of this study will also be used to assist other L2 students, and perhaps enrich their relationship with a second language. Among the problems faced by English students with Arabic as their first language is the acquisition of tenses. The morphemes of the English language differ greatly from those of Arabic, and the irregularities of tenses must be memorized, making the acquisition of tenses one of the most difficult parts of the learning process. As stated by Johanne Paradis, this situation â€Å"†¦is a vulnerable domain for English lang uage learners across acquisition contexts†¦Ã¢â‚¬  Since one of two allomorphs pertaining to the past tense is possible, either [td] or [t or d], the English past tense exhibits a quasi-regularity. These combined attributes create difficulties for the would-be English learner. To appreciate the hardship of the L2 student, data will be collected from thirty students at three consecutive levels of ability. Two approaches will be taken while analyzing the data in an attempt to prove two hypotheses.... Since one of two allomorphs pertaining to the past tense is possible, either [td] or [t or d], the English past tense exhibits a quasi-regularity (McClelland). These combined attributes create difficulties for the would-be English learner. To appreciate the hardship of the L2 student, data will be collected from thirty students at three consecutive levels of ability. Two approaches will be taken while analyzing the data in an attempt to prove two hypotheses. Problem Statement: Learning difficulties arising for L2 students can affect certain aspects of their lives. In the case of foreign students, attempts to integrate into a new country can be inhibited by linguistic difficulties. "knowing a language involves mastering an intricate system full of surprising regularities and idiosyncrasies." (Sag and Wasow, 2001) For people attempting to learn English as a second language, it can be embarrassing and often debilitating to incorrectly express tenses. In the workplace, people with English as a second language are often misjudged as unintelligent. Added to the difficulties most adults have with the correct acquisition of phonological sounds, (Escudero, 2005) the learning of English for Arabic speakers is quite a challenge. The confusion of past tenses was one of the major errors in tenses reported in a study of Arab learners of English at the University of Sudan (Kambal, 1980). Therefore, a study concerning the acquisition of English tenses by Arabic students can assist students with similar problems by determining the most effective solution. Hypotheses: There are two hypotheses which will be used to attempt an explanation of the difficulties that