Browsing by Author "Kumassah, E."
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Item An investigation into senior high school (shs3) physics students understanding of data processing of length and time of scientific measurement in the Volta region of Ghana(International Journal of Research Studies in Educational Technology, 2014-04) Kumassah, E.; Ampiah, J.; Adjei, E.Serious doubt have been raised in the Physics Chief Examiner’s report of the West African Examination Council of Ghana of both physics-1 (theory) and physics-2 (practical) as to whether science students really understand measurement of physical quantities. In view of this, the researcher use a mixed designed method to gather data from SHS3 physics students’ on their understanding of data processing of length and time. A population of 422 SHS3 physics students were sampled and a three item questionnaire on distance and time administered in order to find out whether the problem enumerated by the Chief Examiners’ of Physics concerning physics students exist and were either with the set paradigm or the point paradigm concept. Also twenty SHS3 physics were purposively selected and interviewed in order to validate students’ written responses. The study revealed that students do not have an understanding of using repeat in data set, anomaly in data set and straight line graph of data by the set paradigm concept i.e. all the three items on data processing of students (i.e. UR, AN, and SLG) were in line with the point paradigm concept of measurement. Also students seemed to have difficulty in plotting straight line graph by the use of lines of best fit.Item Spatial distribution, accumulation and human health risk assessment of heavy metals in soil and groundwater of the Tano Basin, Ghana(Ecotoxicology and Environmental Safety, 2018-12) Doyi, I.; Essumang, D.; Gbeddy, G.; Dampare, S.; Kumassah, E.; Saka, D.Soil serves as a vast matrix for heavy metal accumulation and subsequent redistribution to critical aspects of the environment such as groundwater. Soil pollution study is essential for sustainable human health and ecosystem protection. This study provides vital insight into the fate, accumulation, interactions, and health risk posed by heavy metals in soil and groundwater by employing geochemical accumulation index (Igeo), risk assessment models and multivariate data analysis techniques such as principal component analysis (PCA), preference ranking organisation method for enrichment evaluation (PROMETHEE) and geometrical analysis for interactive aid (GAIA). The median Igeo estimates show moderate to strong Pb accumulation levels whilst all the other metals indicate uncontaminated to moderate levels. The PCA output point to anthropogenic origin of Pb and Cd in the Tano Basin and surrounding communities. PROMETHEE-GAIA results indicate that Pb, Cd, Zn and Fe accumulated in the soil matrix may potentially leach into the groundwater resources. The carcinogenic lifetime risks posed by Pb, Cd, and Ni metals to adults are within the tolerable acceptable risk and thus do not present an immediate danger in the study area. Due to the significant toxicity, bioaccumulation and biomagnification properties of Pb and Cd in the environment, areas associated with significant anthropogenic activities require regular monitoring and evaluation in order to ensure that these metals are consistently below the regulatory limits. This study has further elucidated the subject of heavy metal pollution and is therefore expected to enhance sustainable protection of the environment and human health.Item Using Technology to Enhance Students’ Understanding of Selected Science Concepts in Integrated Science(2016-10-26) Kumassah, E.; Nyarko, K.Momentum and Direct Current are fundamental concepts in science, necessary for understanding a variety of phenomena of importance such as work, energy (i.e. potential and kinetic), impulse, power, pressure and force among others. However, investigations conducted among science students in linear momentum and direct current in other countries indicated that the difference between what is taught and what is learnt in science classes is much greater than what most instructors perceived. This is because findings from these studies showed that students have difficulties in understanding linear momentum and direct current. Over the years, this same issues have been raised by the Integrated Science Chief Examiners’ reports at the Colleges of Education level in Ghana. This ongoing study intends to use technology through a three-stage design-based research approach to see if technology could help bring about students' understanding in these two concepts