LEMBAR KERJA SISWA

 

Nama                :

Kelas                :

Nomor absen    :

Mata pelajaran : Ilmu Pengetahuan Alam

Materi               : Keseimbangan Ekosistem

Tanggal                        :

Jawablah pertanyaan-pertanyaan berikut dengan tepat!

1.      Mengapa perusakan hutan dapat menyebabakan daerah tersebut menjadi tandus?

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2.      Apa yang terjadi di musim hujan jika dilakukan penebangan hutan secara sembarangan?

Jawab : ........................................................................................................................................................................................................................................................................

3.      Apa yang menyebabkan hewan–hewan di hutan masuk dan menyerang desa-desa sekitarnya?

Jawab : ........................................................................................................................................................................................................................................................................

4.      Jelaskan manfaat pupuk bagi pertumbuhan tanaman?

Jawab : ........................................................................................................................................................................................................................................................................

5.      Mengapa perburuan liar dapat mengakibatkan keseimbangan alam terganggu?

Jawab : ........................................................................................................................................................................................................................................................................

6.      Apa yang biasanya dilakukan suatu negara untuk mencegah perburuan liar?

Jawab : ........................................................................................................................................................................................................................................................................

7.      Apa yang dimaksud dengan terumbu karang?

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8.      Mengapa perusakan terumbu karang dapat mempengeruhi keseimbangan alam?

Jawab : ........................................................................................................................................................................................................................................................................

9.      Tuliskan dua cara untuk mencegah kepunahan hewan maupun tumbuha?

Jawab : ........................................................................................................................................................................................................................................................................

10.  Tuliskan tiga contoh hewan yang diburu manusia untuk diambil rambut/ bulunya?

Jawab : ........................................................................................................................................................................................................................................................................