🌍 Earth Systems Study Center
🧪 Soil Formation Quiz
Prove you know how rock becomes the soil that grows our food.
Test your knowledge about soil formation, horizons, and weathering! Each quiz randomly picks 5 questions to help you study.
Question 1 of 5
Score: 0/5
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📚 Quick Study Tips
⏰ Formation Time
Hundreds to thousands of years!
That’s why conservation matters
5️⃣ Five Factors
Parent Material, Climate, Time, Vegetation, Topography
All work together!
🌱 Five Horizons
O-A-B-C-R
From organic layer to bedrock
💡 Remember: A horizon (topsoil) is the most important layer for plant growth!