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Muhlis -
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PENGEMBANGAN PERANGKAT PEMBELAJARAN MODEL 5E UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA Muh Nasir; A. Wahab Jufri; Muhlis -
Jurnal Penelitian Pendidikan IPA Vol. 1 No. 2 (2015): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v1i2.14

Abstract

This study aims to develop of learning package 5E model and analyze the effect of its implementation on the differences in student’s critical thinking and arguing skills. Development process follows R & D model by Dick and Carey. Research design follows pretest-posttest nonequivalent control group design. The population of this study was tenth graders of SMA 1 Woha Bima. Total population is 350 students from ten class. The sample was selected by simple random sampling technique and 131 students (four class) is obtained. X1 and X2 class are taught using the 5E models, while the X5 and X9 class with EEK models. Expert judgement results meet the criteria for the development of a very good result with an average value of 3.37. The results of experimental studies showed that: there is a difference in students’ critical thinking in the experimental and control group (t = 3,501, p = 0,001).Keywords: 5E Model, Critical Thinking Skills
EFEKTIFITAS BEBERAPA TANAMAN HIAS DALAM MENYERAP TIMBAL (Pb) DI UDARA Baiq Mirawati; Muhlis -; Prapti Sedijani
Jurnal Penelitian Pendidikan IPA Vol. 2 No. 1 (2016): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v2i1.32

Abstract

The objective of this reasearch was to determine the ornamental plants Lidah mertua (Sanseviera trifasciata.sp), Puring (Codiaeum variegatum), Palem Kuning (Chrysalidocarpus lutecsens) ability to absorb lead (Pb) concentration. This research is descriftive explorative research design with completely randomized design with 9 times treatments and 3 repetitions. The independent variables were lidah mertua (Sanseviera trifasciata.sp) Puring (Codiaeum variegatum), Palem Kuning (Chrysalidocarpus lutecsens), and the subjec variable is measurement of lead (Pb) concentration in the leaves. Data analysis techniques using qualitative and quantitative analysis. Quantitative data was obtained by calculating the lead (Pb) concentration in ornamental plants such as: Lidah mertua (Sanseviera trifasciata.sp) Puring (Codiaeum variegatum), Palem Kuning (Chrysalidocarpus lutecsens) by using AAS (Atomic Absorption Spectrophotometer) test.  Based on reasearch finding, there several finding of oranamental plants ability in absorb lead (Pb): lidah mertua (Sanseviera trifasciata.sp ): 0,06 ppm; 0,1 ppm; 0,15 ppm, puring (Codiaeum variegatum):  0,04 ppm; 0,09 ppm; 0,2 ppm and palem kuning (Chrysalidocarpus lutecsens): 0,02 ppm; 0,04 ppm; 0,11 ppm. Statistical test states that the type of plant and the traffic density does not affect the ability of plants to absorb lead (Pb).Keywords: Lead (Pb), lidah mertua (Sanseviera trifasciata.sp), Puring (Codiaeum variegatum), Palem Kuning (Chrysalidocarpus lutecsens).
Co-Authors A. Wahab Jufri Mirawati, Baiq Muh Nasir Prapti Sedijani