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Soil Formation and Classification

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Questions and Answers

What is the primary driver of the transformation from exposed rock to mature soil?

Climate

Organisms

Time

All of the above (correct)

What is the term given to the process by which rocks are broken down to form soils?

Rock fragmentation

Weathering (correct)

Soilification

Soil formation

What is the primary composition of soil?

Rocks and geological sediments

Minerals and organic matter

Minerals, water, gases, organic material, and living creatures (correct)

Water, gases, and organisms

What is the role of lichen in soil formation?

To help break down the rock Signup and view all the answers

What are the five factors that influence soil formation?

Climate, organisms, relief, rock material, and time Signup and view all the answers

What is the term given to the original material from which soil forms?

Rock or parent material Signup and view all the answers

What is the primary source of a soil's texture?

The rocks and sediments Signup and view all the answers

How long does it take to form one centimetre of soil from some of the harder rocks?

Over 500 years Signup and view all the answers

What is the primary mechanism of physical weathering?

Freezing and thawing Signup and view all the answers

What is the role of plant roots in biological weathering?

To form carbonic acid through respiration Signup and view all the answers

What is the ultimate source of most of the tiny particles making up our soils?

Solid rock Signup and view all the answers

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 Signup and view all the answers

Soil Formation and Classification

Choose a study mode

Podcast

Questions and Answers

What is the primary driver of the transformation from exposed rock to mature soil?

What is the term given to the process by which rocks are broken down to form soils?

What is the primary composition of soil?

What is the role of lichen in soil formation?

What are the five factors that influence soil formation?

What is the term given to the original material from which soil forms?

What is the primary source of a soil's texture?

How long does it take to form one centimetre of soil from some of the harder rocks?

What is the primary mechanism of physical weathering?

What is the role of plant roots in biological weathering?

What is the ultimate source of most of the tiny particles making up our soils?

Why is it necessary for rock to be broken down to form soil before plant life can flourish?

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