4. Earth Systems
Soils — Quiz
Test your understanding of soils with 5 practice questions.
Practice Questions
Question 1
Which of the following is NOT a fundamental factor in soil formation?
Question 2
Which soil horizon is characterized by eluviation, the removal of clay, iron, and organic matter?
Question 3
A soil sample composed of 40% sand, 40% silt, and 20% clay is classified as which texture class?
Question 4
A soil pH increases from 5.0 to 7.0 after liming. By what factor has the hydrogen ion concentration decreased?
Question 5
Which soil component contributes most significantly to high cation exchange capacity (CEC)?