The Science of Soil Formation
Test your knowledge about how soil forms, its components, and what makes soil healthy for plant growth.
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8 questions · Quick play · Instant results
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Quiz Questions & Answers
Review every prompt, the correct responses, and helpful context to prep for your own run-through.
Question 1: What is the main component of soil?
Water
Tiny bits of rock
Dead plants
Organic matter
Question 2: Which natural process is NOT a way that rocks can be broken down into soil?
Freezing water
Wind erosion
Wave action
Photosynthesis
Question 3: What type of soil does quartz typically create when it weathers?
Clay
Sand
Loam
Mud
Question 4: How can you tell if soil has a high amount of organic matter?
It is darker/blacker
It is lighter in color
It is gray
It is reddish
Question 5: Approximately how long does it take to form just the top layer of soil?
100 years
1 year
10 years
1000 years
Question 6: Which of these can contribute to rock weathering?
Only plant roots
Only temperature changes
All of the above plus animal activity
Only water and wind
Question 7: What type of rock creates clay soil when weathered?
Granite
Shale
Marble
Quartz
Question 8: What is organic matter in soil composed of?
Only living plants
Only animal remains
Only dead plants
Decomposed plants, animals, and fungi