OSN IPA Siklus biogeokimia (part 2)
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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80 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Siklus karbon berperan penting dalam kestabilan suhu bumi. Salah satu proses berikut ini yang paling berpengaruh terhadap peningkatan CO₂ di atmosfer adalah...
A. Fotosintesis
B. Respirasi seluler
C. Pembakaran bahan bakar fosil
D. Pelapukan batuan karbonat
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Peran organisme dekomposer dalam siklus nitrogen adalah untuk...
Menyerap nitrogen bebas dari atmosfer
Mengubah amonia menjadi nitrat
Menguraikan bahan organik menjadi amonia
Mengikat nitrogen dari udara
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Proses nitrifikasi dalam siklus nitrogen dilakukan oleh...
Rhizobium dan Azotobacter
Nitrosomonas dan Nitrobacter
Clostridium dan Pseudomonas
Anabaena dan Nostoc
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dalam siklus fosfor, berbeda dengan karbon dan nitrogen, fosfor...
Tidak melibatkan unsur dari atmosfer
Tidak mengalami proses pengendapan
Tidak tersedia secara alami di biosfer
Dihasilkan oleh aktivitas vulkanik
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Salah satu dampak dari terganggunya siklus nitrogen akibat penggunaan pupuk nitrogen berlebihan adalah...
Pengasaman tanah
Kematian mikroorganisme tanah
Eutrofikasi perairan
Pengurangan kandungan karbon tanah
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Organisme yang berperan dalam fiksasi nitrogen secara biologis adalah...
Bakteri denitrifikasi
Ganggang hijau
Bakteri fotosintetik
Rhizobium
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Karbon dapat berpindah dari atmosfer ke biosfer melalui...
Respirasi
Pembakaran
Fotosintesis
Pengendapan
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