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Recent Submissions
DENTIFYING AND MINIMIZING STUDENTS’ MISCONCEPTIONS IN
CHEMICAL BONDING: THE CASE OF GRADE 9 STUDENTS IN KUTERE
SECONDARY SCHOOL, SILTE ZONE, CENTRAL ETHIOPIA, ETHIOPIATHE CASE OF GRADE 9 STUDENTS IN KUTERE SECONDARY SCHOOL
(Wolkite University, 2024-09-01) HASSEN MAHMUD ALI
Children do not come to school as a “tabula rasa, but rather with knowledge gained from different sources and through daily life. These different sources can help or hinder learning. This situation is said to be misconception. The main purpose of this study was to identify and minimize students’ misconceptions about chemical bonding. The study was carried out in Kutere Secondary School in Silte Zone, Central Ethiopia with special reference to grade 9 students’ focus. Descriptive survey, especially a case study was employed to address the problem. To conduct this study 72 students were selected through stratified sampling technique from the total population of 360 students. To achieve the objectives of the study employed data gathering tools were the conceptual understanding tests (pre-and post-test) in the chemical bonding topic. Each question in the conceptual understanding test was designed to previous students’ knowledge and understanding about chemical bonding. All data collected were analyzed quantitatively. The study described the causes for these misconceptions. These were students’ personal experience, inappropriate use of laboratory, misinformation, inattentiveness, selective attention, and unevaluated text books. Replacing those misconceptions with scientifically accepted conceptual views is necessary and efforts should be made to create awareness continuously for students, teachers, school principals and educational experts. Conducting training and different workshop with those concerned bodies is more advisable to increase the understanding and to avoid (minimize) misconceptions in chemical bonding. Thus, to improve the situation, it is recommended that every educator should be aware of students background, daily life experience, pre conceptions before providing lessons on chemistry teachers should spend more time to produce more conceptual talk about the topic to bring conceptual understanding, different instructional methods should be applied to support conceptual understanding of chemical bonding.
A CASE STUDY AT BURKA SEBETA 10 TH GRADE AND BURKA, SEBETA 12TH GRADE SECONDARY SCHOOL AT SEBETA SUBCITY SHEGER CITY OROMIA ETHIOPIA.
(Wolkite University, 2024-05-01) BACHA DEBELE CHALA
Chemical bonding is a topic that students commonly find abstract and problematic and for which they develop a wide range of misconceptions . Thus, chemical bonding is considered as difficult topic and students had misconception about bond polarity, intermolecular force, intramolecular force, the octet rule, conductivity, Solubility shapes and lattice energy. The purpose of this study was to identify the major misconceptions of grade 12 and 10 students’ on the chemical bonding and to identify the sources of these misconceptions. The nature of the study is a descriptive method. Participants of the study were 67 grade 12 students and 75 grade 10 students. The FTMCT was developed after their prior conceptions about the selected topics of the study were collected from students through review of related literature, observation of lessons on chemical bonding, common mistakes of focus class students during different assessment techniques (answering class tests) and individual interview questions with volunteer students. Data was collected by using FTMCT and Interview questions were employed to gather the relevant data. Data was analyzed by using Statistical Package for the Social Science program (SPSS). The results from SPSS (bivariate and reliability analysis) showed that average value of reliability coefficient and correlation between 1 st tier and 2nd tiers, 3 rd tiers and 4 th tiers, 2nd tier and 4 th tier were .99, .75, .68, .67 of grade 12 students and .96, .73, .79, .74, of grade10 student respectively. The significances also shown that chemistry daily experiences, text books, language difficulty and chemistry instructional methods were the major source of students’ misconception about chemical bonding. The result showed that the majority of the students had high level of misconceptions about chemical bonding. In this study the common misconceptions were identified on chemical boding which was categorized into: bond polarity, solubility, intermolecular force, intramolecular force, the octet rule, shapes, conductivity and lattice energy.
AN ASSESSMENT ON THE ROLE OF NATIONAL DIALOGUE IN ENSURING DEMOCRATIC POLITICAL TRANSITION IN ETHIOPIAN SINCE 2018
(wolkite unvesity, 2022-05-01) FIRITO KASSA
Recently Ethiopia attempted a democratic political transition in 2018 by allowing opposition parties to participate in the political process. However, the initial attempt at democratic political transition has not been consolidated by numerous obstacles that need to be given serious attention to consolidating the democratic political system. Ethiopia's government organized a nationwide dialogue to solve the country's multifaceted concerns. The main objective of this study was to provide an assessment of the role of national dialogue in ensuring democratic political transition in Ethiopia since 2018. To achieve this objective, the study employed a qualitative research approach and an exploratory study design. The study used primary and secondary sources. Primary data was collected through in-depth interviews and focus group discussions.Non-probable sampling, particularly purposive sampling, was employed to select key informants and FGD discussants. The thematic analysis method was applied to analyze the collected data. The findings of the study identified thatthe FDRE constitution, federal structure, historical narratives, national flag, emblems, heroes, social cohesion, and political culture are major national agendas that should be addressed during the planned national dialogue. *RYHUQPHQWV SROLWLFDO SDUWLHV¶ PHGLD FLYLO VRFLHW\ DQG H[WHUQDO DFWRUV DUH WKH PDLQ stakeholders to be included in the national dialogue. According to the findings, factors influencing the success of national dialogue in Ethiopia include inclusiveness, representation, and selection criteria; setting clear objectives and agendas; credible conveners; public support; linkages with other political processes, and external actors; national ownership; and learning from experience.
ASSESSMENTS OF THE PRODUCTIVE AND REPRODUCTIVE PERFORMANCES OF LOCAL AND CROSS BRED DAIRY CATTLE IN SELECTED DISTRICTS OF GURAGHE ZONE, CENTRAL ETHIOPIA
(wolkite university, 2025-07-03) ABEBE HAILEMARIAM ABDELA
The study was conducted at Meskan, S/sodo and Endegagn in Gurage Zone, Central Ethiopia, aimed to assess the Productive and Reproductive Performance of Local and Cross Bred Dairy cattle .Three districts namely Meskan, Endegagn and S/Sodo were purposively selected based on AI services. A total of 379 respondents (155 from Meskan, 102 from Endegagn and 122 from S/Sodo) systematic sampling selected. All the collected data were analyzed using SPSS version of 20. Average daily milk yield of local and Crosse bred dairy cows in Meskan, S/sodo and Endegagn district daily milk yiled of were found1.33±0.05, 1.31±0.13, and 1.3±0.05 liters, respectively. Whereas crossbred cows produced 6.42±0.44, 4.67±0.34, and 2.9±0.24 liters, respectively. Total lactation length Local and crossbred cows in 4.16±0.13, 3.27±0.21and1.54±0.221liters, respectively Meskan, S/sodo and Endegagn whereas crossbred cows. 4.9±0.1, 3.23±0.2and2.61±0.22 liters, respectively.AFC Local and Cross bredcows39.35±2.06, 37.2±2.0 and36.23±1.4 months respectively. Whereas crossbred cows 28.5±2.1, 26.02±1.7 and25.04±1.3 months, respectively.(CI) Local and Cross bredcows19.14±1.6,17.5±1.4and15.5±1.5liters,respectively. Whereas crossbred cows17.5.±1.01, 15.02±0.97and10.51±1.02 liters, respectively The estimated daily milk yield of local and crossbred cow were found to be 1.31±0.12 and 4.61±0.34 liters, respectively. The estimated lactation yield of local and crossbred dairy cow in the study area were 350.2±1.74and 1489.31±11.89liters, respectively. The average age at first service of local and crossbred dairy heifers in the study areas were37.6±1.82 and 26.52±1.70 months, respectively. The ages at first calving (AFC) of the indigenous and crossbred were 48.24±2.24and 37.65±2.10 months, respectively. The average calving intervals of local and crossbred dairy cows in the study area were 17.38±1.2 and 14.34±1.0 months, respectively. In parametrs we have studied crossbred animals are showing better performancs, than the local animals, even though both are showing low performances Generally, concluding the production and reproductive performances of dairy cattle the study area will be difficult without, coordinated interventions from all the stakeholders. Specially With focuses on feed helth, environment etc. With proper management.
EFFECT OF DIFFERENT GARLIC (Allium sativum l.) EXTRACT LEVELS INCLUSION ON GROWTH PERFORMANCE AND CARCASS CHARACTERISTICS OF COMMERCIAL BROILER
(wolkite university, 2022-06-02) AYELU DAGNACHEW
Commercialization of chicken farming and improvement of production efficiency has led to be the adoption of a range of additives as growth promoter. Antibiotic-based growth promoter have long been utilizing as animal feed additives. Wide spread usage of these substances has resulted in an escalation of antibiotic resistance and the accumulation of antibiotic residues in animal product. Because of these weaknesses there is rising interest in employing natural growth promoters. Therefore, this study has conducted on the effects of different garlic extract levels inclusion on the growth performance and carcass characteristic of broiler. The experiment was arranged in a completely randomized design (CRD) with four treatments, each replicated three times with 15 birds each. 180 chicks with similar body weight were used for this trial and were randomly distributed to the four treatments. They were T1 (NC, basal diet and drinking water), T2 (PC, basal diet + drinking water with oxtetracycline (0.2 g/ 10 litter), T3 (basal diet + drinking water (1.5% GEX)) and T4 (basal diet + drinking water (3% GEX). During the trial periods daily feed intake and weekly body weight were recorded and carcass evaluation was made. The result obtained that, the body weight gain and feed conversion ratio of birds were significantly (P<0.05) improved by 1.5 and 3% GEX inclusion levels. Most of carcass trait such that slaughter, dressing, breast, liver and GIT weight were highly (P< 0.05) affected by 1.5 and 3% GEX inclusion levels. Reduced abdominal fat weight and percentage (P< 0.05) was recorded in GEX inclusion levels. Generally, based on the results of the current study garlic extract at 1.5 and 3% inclusion levels in drinking water should be considered as potential growth promoters that may replace the antibiotic in broiler farm.