12 Questions
What is the primary driver of the transformation from exposed rock to mature soil?
All of the above
What is the term given to the process by which rocks are broken down to form soils?
Weathering
What is the primary composition of soil?
Minerals, water, gases, organic material, and living creatures
What is the role of lichen in soil formation?
To help break down the rock
What are the five factors that influence soil formation?
Climate, organisms, relief, rock material, and time
What is the term given to the original material from which soil forms?
Rock or parent material
What is the primary source of a soil's texture?
The rocks and sediments
How long does it take to form one centimetre of soil from some of the harder rocks?
Over 500 years
What is the primary mechanism of physical weathering?
Freezing and thawing
What is the role of plant roots in biological weathering?
To form carbonic acid through respiration
What is the ultimate source of most of the tiny particles making up our soils?
Solid rock
Why is it necessary for rock to be broken down to form soil before plant life can flourish?
Because plants cannot grow directly in rock
Learn about the process of soil formation, from exposed rock to mature soil, and how it's classified. Understand the role of climate, organisms, and time in soil formation. Discover how soil is a dynamic ecosystem.
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