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LEMBAR KERJA PESERTA DIDIK 1 MENGIDENTIFIKASI KONSEP PENCEMARAN LINGKUNGAN IDENTITAS ILMU PENGETAHUAN ALAM KELAS VII/SEMESTER II PERCOBAAN KE 1 KELOMPOK : 1. 2. 3. 4. I Pada bab ini kompetensi dasar dan tujuan yang harus dimiliki peserta didik adalah sebagai berikut : KOMPETENSI DASAR 3.8 Menganalisis terjadinyapencemaran lingkungan dan dampaknya bagi ekosistem A. PENDAHULUAN ORIENTASI Motivasi Setiap waktu manusia akan selalu melakukan aktivitas, setiap aktivitas manusia akan menghasilkan sisa untuk lingkungan.zat sisa dalam jumah banyak berakumulasi akan mencemarkan lingkungan Apersepsi Berdasarkan gambar yang di tampilkan, Guru menanyakan hal yang berkaitan dengan materi sebelumnya dan dikaitkan dengan materi sekarang a. Apa yang bisa diamati dari gambar yang telah diamati b. Dikaitkan materi sebelumnya “ Bagaimana dampak pencemaran pada ekositem dan makhluk hidup di dalamya c. Apa yang membedakan 2 gambar tersebut d. Apa yang menyebabkan pencemaran terjadi 2. KEGIATAN INTI Kemudian peserta diarahkan ke Tujuan pembelajaran : 6. Guru meyampaikan kepada peserta didik tujuan dan manfaat pembelajaran a. Pengertian pencemaran lingkungan b. Penyebab pecemaran lingkungan c. Batasan zat pencemaran lingkungan d. Jenis pencemaran lingkungan A.STIMULUS Guru memperlihatkan gambar/video, peserta didik diminta untuk mengamati B. IDENTIFIKASI MASALAH Berdasarkan gambar yang diperlihatkan guru, Peserta didik mengidentifikasi masalah dalam bentuk pertanyaan .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... C. MENGUMPULKAN DATA Menyiapkan alat dan bahan ALAT a. b. c. d. e. f. g. Tabung reaksi 3 buah gelas kimia Rak tabung reaksi Pipet tetes Kertas lakmus biru Kertas lakmus merah Ph Indikator BAHAN a. Air selokan 100ml b. Air mineral 100 ml c. Air limbah 100 ml Percobaan 1 Siapkanlah air dari selokan sekolahmu sebanyak 100ml, air sumur 100ml, air limbah 100ml Langkah Percobaan Tabel hasil percobaan 1 Siapkanlah alat dan bahan yang akan digunakan di atas meja percobaan Berilah label masing gelas dengan A untuk air selokan, B untuk air mineral, C untuk air limbah Masukkan sampel 3 air ke masingmasing tempat sesuai label. Uji larutan A, B,C dengan menggunakan lakmus merah dan lakmus biru serta Ph indikator serta amati warna dan bau 4 5 3 2 1 Berdasarkan percobaan lengkapilah tabel di bawah dengan benar ! NO INDIKATOR Uji indikator LARUTAN Lakmus Merah 1. Air selokan 2. Air mineral Lakmus Biru Hasil Pengamatan PH Indikator Bau 1. ket Warna us? Mengapa demikian? : ................................................................................................................................................. ................................................................................................................................................. ................................................................................................................................................. 2. Mengapa ketiga air menunjukkan hasil yang berbeda pada kertas lakmus? ................................................................................................................................................. ................................................................................................................................................. .................................................................................................................................................. ................................................................................................................................................. .................................................................................................................................................. ................................................................................................................................................. .................................................................................................................................................. ................................................................................................................................................. .................................................................................................................................................. ................................................................................................................................................. .................................................................................................................................................. ......................................................................................................................................... .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. pa yang terjad i pada kertas lakm A 3. Berdasarkan pengamatan dan studi literasi, kondisi air manakah yang paling baik dan paling buruk? ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ 4. Menurut pendapat kalian, mengapa kualitas air yang diamati dapat berbeda-beda? Apa ................................................................................................................................................ penyebabnya? ................................................................................................................................................ ................................................................................................................................................. ................................................................................................................................................ ................................................................................................................................................. ................................................................................................................................................ ................................................................................................................................................. ................................................................................................................................................ 5. Apa yang dimaksud dengan pencemaran? ................................................................................................................................................. ................................................................................................................................................ ................................................................................................................................................. .................................................................................................................................................. ................................................................................................................................................. ................................................................................................................................................ ................................................................................................................................................. ................................................................................................................................................ ................................................................................................................................................. ................................................................................................................................................ 6. Apakah pencemaran hanya dapat terjadi pada air?kemukakanlah pendapatmu! ................................................................................................................................................. ................................................................................................................................................ ......................................................................................................................................... .................................................................................................................................................. ................................................................................................................................................ .................................................................................................................................................. ................................................................................................................................................ .................................................................................................................................................. ................................................................................................................................................ Percobaan 2 .................................................................................................................................................. ................................................................................................................................................ .................................................................................................................................................. ................................................................................................................................................ .................................................................................................................................................. .. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. ................................................................................................................................ A E B F C D G H Peserta didik mengamati gambar di atas, lalu berdasarkan pengamatan gambar dan kaji literatur yang ada peserta didik menjawab pertanyaan di bawah: 1. Identifikasilah berapa jenis pencemaran yang dapat diamati dari gambar di atas ... ..... ..................................................................................... .................................................................................. .................................................................................... .......................... 2. Buatlah ciri yang dapat kamu amati dari masing-masing pencemaran yang sudah kamu amati dari gambar .... ...... ..................................................................................... ................................................... .................................. .................................................................................... ................ 3. Identifikasilah apa saja penyebab pencemaran lingkungan .......... ..................................................................................... ....................................................... .................................. .................................................................................... .................... E. PENGOLAHAN DATA Mengkomunikasikan Amati tabel percobaan pertaman Jawablah pertanyaan di bawah ini Berdasarkan hasil 2 kegiatan di atas percobaan dan pengamatan diatas maka : 1. Sebutkanlah pengertian pencemaran lingkungan ..................................... .................................................................................... .................................................................................. ................................................................................ 2. Sebutkan jenis pencemaran lingkungan ..................................... .................................................................................... .................................................................................. .............................................................................. 3. Jelaskan penyebab pencemaran lingkungan .................................... .................................................................................... .................................................................................. .............................................................................. a. Setelah itu peserta didik perwakilan setiap kelompok diminta mempresentasikan hasil percobaan b. Kelompok lain menanggapi hasil presentasi kelompok lain yang berbeda c. Guru mengkonfirmasi hasil percobaan kegiatan peserta didik dan memberi penguatan F. SIMPULAN Apa yang dapat anda simpulkan berdasarkan hasil kegiatan yang telah anda lakukan? ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ SE LAMAT BEKERJA ............................................................................................................................................................ TERIMA KASIH ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ..................................... .
