OSN IPA Materi Sistem Sonar Hewan (part 2)
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hewan berikut memiliki sistem sonar paling presisi dalam lingkungan udara:
Burung hantu
Kelelawar
Walet
Anjing laut
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apa alasan ilmiah mengapa sinyal sonar kelelawar tidak memekakkan telinganya sendiri?
Suara diarahkan keluar mulut
Kelelawar menutup saluran telinga saat memancarkan sonar
Sonar bersifat sangat lembut
Sonar berfrekuensi sangat rendah
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fungsi utama dari “jam biologis” dalam migrasi burung adalah...
Menentukan musim kawin
Sinkronisasi navigasi berdasarkan matahari dan bintang
Membantu berburu mangsa
Menentukan kecepatan terbang
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mengapa frekuensi tinggi pada sonar tidak digunakan untuk jarak jauh?
Karena tidak bisa merambat di udara
Karena cepat diserap medium
Karena tidak terdengar
Karena dipantulkan oleh air
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bagaimana burung dapat mengetahui perubahan lintang selama migrasi?
Melalui arah angin
Dengan memperhatikan panjang siang–malam
Dengan pola ombak
Berdasarkan aroma udara
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Salah satu keuntungan utama sonar dibanding penglihatan di bawah air adalah...
Sonar lebih cepat dari cahaya
Air menyerap cahaya tetapi tidak suara
Sonar menghasilkan panas
Sonar menghasilkan listrik
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fenomena “peta magnetik” pada hewan berarti...
Hewan menyimpan GPS di otaknya
Hewan dapat membaca posisi relatif berdasarkan medan magnet
Hewan dapat mengeluarkan medan magnet
Hewan mencium bau magnetik
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