82 research outputs found
Penerapan Model Pembelajaran Kooperatif Tipe Two Stay Two Stray Terhadap Hasil Belajar Kimia Siswa Kelas XI IPA 2 Pada Pokok Bahasan Laju Reaksi Di SMA Negeri 1 Kasimbar
This sudy presents the research of classroom action (PTK) executed in two cycle, in which every cycle cover the planning, execution, observation and reflection. This research aims to increase chemistry result study for student of XI IPA2 class on senior high school 1 of Kasimbar in rate reaction material through application of cooperative learning two stay two stray model. Research subject was XI IPA2 class on senior high school 1 of Kasimbar amount to 35 students. Data type was collected data qualitatively in the form of result of observation of student activity and learn at the time of process learn take place, and quantitative data in the form of result learn the student of final tes evaluation of action. Result of cycle I obtained by activity of student and teacher be at the good criterion, percentage of absorpsion classical 62.0% and complete learn the classical 65.7%. The second cycle experience of the improvement, that is activity of student and teacher be at the criterion very good, percentage of absorpsion classical 76.8% and complete learn the classical 88.5%. Results indicated that the application cooperative learning model two stay two stray can improved chemistry result study for student of xi IPA2 class in reaction rate material on senior high school 1 of Kasimbar
Indikator Asam-Basa dari Bunga Dadap Merah (Erythrina Crista-galliL.)
Dadap red (erythrina crista-galli L.) is belonged to the legumes (fabaceaea) family which, is one of the flowering shade plants that often used as an ornamental plant. This plant has a bright red flower, a taproot with root nodule bacteria nitrogen fixation and compound leaf consists three strands on each stem. This research is climed to proves that the extract of dadap red flower can be used as acid-base indicators. Dadap red flowers was macerated using methanol then filtered. The filtrate was ready to use as an acid-base indicator. The extract is tested in an acid-base, buffer solutions, and was compared with phenolphthalein for a strong acid with a strong base while a methyl orange a weak base with a strong acid. Based on the result, indicator of dadap red flower extrat in the strong acid was red colour, while in the weak acid was pink, and also in the strong base was dark green and in the weak base was purple. Furthermore, in the buffer solution, the indicator of dadap red flower extract gave four groups of colour change, namely red color at pH 1 to pH 6, colorless at pH 7 to pH 9, brown at pH 10 and blue at pH 11 to pH 12. Additionally, to attain the end point of titration, the indicators of dadap red flower extract gives a similar results with the comparison indicators. The results showed that the indicator of dadap red flower extracts can be used as an alternative indicator
Pengaruh Mind Mapping melalui Brain Based Learning terhadap Hasil Belajar Siswa pada Materi Ikatan Kimia di Kelas X MIA SMA Negeri 1 Marawola
A research about the influence of mind mapping through brain-based learning in chemical bonding subject on students learning outcomes in class X MIA SMA Negeri 1 Marawola has done. The problem in this research whether there was an influence of mind mapping through brain-based learning to the learning outcomes of students in chemical bonding subject in class X MIA SMA Negeri 1 Marawola. The aim of this study is to determine the influence of mind mapping through brain-based learning in chemical bonding subjecton student learning outcomesin class X MIA SMA Negeri 1 Marawola. This study is a quasi-experiment with purposive sampling. The sample of research consists of two classes, MIA 1, consist of 26 students as a experiment class taught with brain-based learning using mind mapping method and class X MIA 3, consist of 26 students as a control class taugth with brain-based learning using the scientific method. Research results obtained value of x, in the experimental class = 79.30 with a standard deviation = 13.80 and in the control class = 74.30, with a standard deviation = 11.80. From these results, a testing for normality class was done, in the experimental class χ2 value= 4.71 and in the control class χ2 value= 1.85 with the χ2 table = 7.81. The data is normally distributed it as can be seen that both in the experimental class and the controll class χ2 value is less than χ2 table, 4.712.02) in significance level χ = 0.05 and degrees of freedom dk = 50. It can be concluded that the mind mapping through brain-based learning in these experiment class on chemical bonding subject give a positive effect on student learning outcomes in comparison with the control class SMA Negeri 1 Marawola
Meningkatkan Hasil Belajar Siswa Pokok Bahasan Alat Pernapasan Pada Manusia Menggunakan Media Gambar Pada Siswa Kelas V SDN Taningkola
Tujuan penelitian ini adalah meningkatkan hasil belajar siswa kelas V SDN Taningkola melalui penggunaan media gambar. Penggunaan media gambar adalah pembelajaraan yang memanfaatkan gambar organ-organ tubuh manusia sehingga siswa dapat lebih mudah mengetahui letak dan fungsi organ tersebut. Masalah yang hendak dipecahkan dalam penelitian ini adalah rendahnya hasil belajar IPA Siswa Kelas V SD di Taningkola Kab Tojo Una-Una, penelitian ini terdiri dari dua siklus, pada setiap siklus terdiri dari empat tahap yaitu: perencanaan, pelaksanaan, observasi, dan refleksi. Penelitian ini melibatkan 25 orang siswa. Hasil penelitian menunjukan bahwa terjadi peningkatan hasil belajar siswa seiring dengan diterapkannya media Gambar. Hasil observasi aktivitas siswa yang diperoleh pada siklus I yakni rata-rata 56,25% atau dalam kategori cukup, pada siklus II diperoleh aktivitas siswa rata-rata 90,63% dengan peningkatan aktivitas siswa berada dalam kategori baik dan sangat baik. Hasil belajar pada siklus I dan siklus II yaitu skor rata-rata pada siklus I adalah 52,56 dan skor rata-rata pada siklus II yaitu 70,12. Dengan demikian, berdasarkan hasil penelitian menunjukkan bahwa penggunaan media Gambar dapat meningkatkan hasil belajar dan aktivitas siswa kelas V SD Taningkola Kab. Tojo Una-Una
Penerapan Experiential Learning Dalam Pembelajaran IPA Pada Materi Ciri Khusus Makhluk Hidup Untuk Meningkatkan Hasil Belajar Siswa Kelas VI SDN Inpres Mandok
Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa Kelas VI SDN Inpres Mandok melalui penerapan Experiential Learning dalam pembelajaran IPA pada materi ciri khusus makhluk hidup. Subyek penelitian ini adalah siswa Kelas VI SDN Inpres Mandok dengan jumlah siswa 7 orang yang terdiri dari 5 orang siswa laki-laki dan 2 orang siswa perempuan. Penelitian ini adalah penelitian tindakan kelas yang terdiri atas dua siklus. Rancangan penelitian mengikuti tahap penelitian yang mengacu pada modifikasi diagram Kemmis dan Mc. Taggart, yaitu 1) Perencanaan tindakan, 2) Pelaksanaan tindakan, 3) Observasi, dan 4) Refleksi. Instrumen yang digunakan adalah lembar observasi guru dan siswa, serta tes hasil belajar siswa. Hasil penelitian menunjukkan bahwa terjadi peningkatan hasil belajar, dari siklus I ke siklus II. Peningkatan tersebut dibuktikan dengan hasil penelitian yaitu tes hasil belajar dan hasil observasi. Hasil tes belajar siswa yang diperoleh pada siklus I, yakni siswa yang tuntas 5 dari 7 siswa atau persentase ketuntasan klasikal sebesar 71,4% dan daya serap klasikal 70%, serta aktivitas siswa dalam kategori baik. Pada siklus II diperoleh ketuntasan klasikal 100% dan daya serap klasikal sebesar 82,9%, serta aktivitas siswa berada dalam kategori sangat baik. Dengan demikian, penerapan Experiential Learning dalam pembelajaran IPA pada materi ciri khusus makhluk hidup dapat meningkatkan hasil belajar siswa Kelas VI SDN Inpres Mandok
Penerapan Pendekatan Resource Based Learning Pada Materi Energi Dan Perubahannya Untuk Meningkatkan Hasil Belajar Siswa Kelas IV SD Inpres Cendanapura
Penelitian untuk meningkatkan hasil belajar telah dilakukan melalui penerapan pendekatan resource based learning pada materi Energi dan Perubahannya. Salah satu penyebab rendahnya pemahaman konsep IPA diakibatkan oleh pendekatan pembelajaran yang digunakan oleh guru selama proses belajar mengajar yang kurang tepat sehingga siswa cenderung bersifat pasif. Penelitian tindakan kelas ini dilakukan dalam dua siklus. Setiap siklus terdiri dari empat tahap yaitu perencanaan, pelaksanaan tindakan, observasi dan refleksi. Subjek penelitian ini adalah 17 orang siswa Kelas IV SD Inpres Cendanapura. Data dikumpulkan melalui lembar observasi aktifitas siswa dan guru dalam pembelajaran, tes hasil belajar, dan wawancara. Hasil penelitian menunjukkan bahwa aktivitas siswa dan guru pada proses pembelajaran mengalami peningkatan dari siklus I ke siklus II. Hasil wawancara pada siklus I dan siklus II menunjukkan bahwa siswa senang dengan pendekatan resource based learning yang diterapkan oleh peneliti. Hasil tes juga menunjukkan terjadi peningkatan sebesar 17% ketuntasan klasikal dari 65% pada siklus I menjadi 82% pada siklus II. Daya serap klasikal meningkat sebesar 8% dari 71% pada siklus menjadi 79% pada siklus II. Berdasarkan hasil ini maka dapat disimpulkan bahwa pendekatan resource based learning dapat meningkatkan hasil belajar materi Energi dan Perubahannya pada siswa kelas IV SD Inpres Cendanapura
Identifikasi Zat Warna Rhodamin B pada Lipstik yang Beredar di Pasar Kota Palu
Rhodamine B is a synthetic dye used for colouring of paper, textiles and inks. Rhodamine B is able to cause an irritation of the respiratory tract, liver damage and as a carcinogenic substance. The use of dyes aims to obtain more attractive colour. This study aims to identify the rhodamine B on lipsticks in the market in Palu City. The dye was determined using thin layer chromatography (TLC) through qualitative and quantitative tests. The results showed that all lipstick samples were negative containing rhodamine B. Based on qualitative test by TLC did not found similar Rf 0.72 cm confirming the reference solution for rhodamine B, where the value of Rf on consecutive samples were 1A code samples obtained value Rf = 0.58 cm, the sample code 2A obtained value Rf = 0.46 cm, the sample code 3A Rf value = 0.68 cm, the sample code 4A obtained Rf = 0.65 cm, code samples obtained 1B Rf = 0.49 cm, and the sample code 2B obtained value Rf = 0.50 cm. Based on this study it can be concluded that all 6 lipstick samples tested did not contain rhodamine B
Serbuk dari Limbah Cangkang Telur Ayam Ras sebagai Adsorben terhadap Logam Timbal (Pb)
The aim of this study is to determine the optimum time and weight required for eggshell powder when it absorbs Pb, and to determine the adsorption capacity of the eggshell powder at the optimum condition for Pb with the shaking time variation of 10, 20, 30, 40 and 50 minutes. The weight variation of adsorbent is 0.25, 0.50, 0.75, 1 and 1.25 grams. The work steps in this study were production of the eggshell powder as the adsorbent, making of a solution of Pb 60 ppm, and determination the Pb concentration at equilibrium using a spectrophotometer spektrodirect respectively. The results obtained after the adsorption process for the time variation was 30 minutes, this optimum time giving %Pb absorbed was 94.65%. The weight variation of adsorbent is 1 gram, this optimum weight giving %Pb absorbed was 98.91%. Furthermore, the absorption capacity adsorbent of eggshell powder in both optimum conditions was 0.078 mg Pb/mg adsorbent
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