Origin of Soil and Types of Rocks Quiz
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Questions and Answers

Which component makes up the largest percentage of soil constituents?

  • Air
  • Organic matter
  • Water
  • Minerals (correct)
  • What is the main origin of soil?

  • Decomposed organic matter
  • Weathered rocks and minerals (correct)
  • Volcanic ash
  • Synthesized chemicals
  • What type of rock is formed due to high temperature and pressure, particularly in the mantle?

  • Organic
  • Sedimentary
  • Igneous
  • Metamorphic (correct)
  • Which process is involved in the formation of igneous rocks?

    <p>High pressure and fragmentation</p> Signup and view all the answers

    What is the primary difference between primary and secondary minerals?

    <p>Secondary minerals are least resistant.</p> Signup and view all the answers

    What kind of rocks are diorite, pumice, granite, obsidian, and adobe examples of?

    <p>Intrusive rocks</p> Signup and view all the answers

    What does the Soil Forming Equation by Hans Jenny consist of?

    <p>cl, o, r, p, t</p> Signup and view all the answers

    In a soil profile, what is a unique feature that may not always be observable?

    <p>horizons</p> Signup and view all the answers

    Which scientist is credited with the Soil Forming Equation from 1941?

    <p>Hans Jenny</p> Signup and view all the answers

    What does 's' represent in the Soil Forming Equation?

    <p>soil</p> Signup and view all the answers

    Which vertical section of the soil consists of unique horizons in a profile?

    <p>Soil Profile</p> Signup and view all the answers

    What is the dominant mineral composition of the C horizon in soil development?

    <p>Primary minerals (sand and silt)</p> Signup and view all the answers

    Which horizon in soil development is characterized by the accumulation of secondary minerals?

    <p>B horizon</p> Signup and view all the answers

    In which horizon of soil development do you find the zone of cluviation?

    <p>C horizon</p> Signup and view all the answers

    What is the parent material of the 45% mineral component of soil?

    <p>Primary minerals</p> Signup and view all the answers

    Which horizon is characterized by a bleached appearance and domination with primary minerals?

    <p>A horizon</p> Signup and view all the answers

    Which horizon is characterized by 50% A and 50% B?

    <p>AB horizon</p> Signup and view all the answers

    In the A/B horizon, what does the first letter represent?

    <p>Dominant characteristic</p> Signup and view all the answers

    What is the characteristic of the AB horizon?

    <p>Dominant A horizon</p> Signup and view all the answers

    Which horizon would likely have a weak presence of A characteristics?

    <p>BC horizon</p> Signup and view all the answers

    What does AB signify in terms of the A/B horizon composition?

    <p>50% A and 50% B</p> Signup and view all the answers

    What distinguishes Transition Horizon in a soil profile?

    <p>It consists of two master horizons</p> Signup and view all the answers

    Which of the following is a common feature of Transition Horizon in a soil profile?

    <p>Presence of both characteristics of preceding horizons</p> Signup and view all the answers

    What role does Transition Horizon play in a soil profile?

    <p>Serves as a gradational layer between different horizons</p> Signup and view all the answers

    How does Transition Horizon contribute to soil development?

    <p>By aiding in the breakdown of minerals into nutrients</p> Signup and view all the answers

    Which factor primarily influences the formation of Transition Horizon in a soil profile?

    <p>Climate conditions in the region</p> Signup and view all the answers

    What type of change occurs in the chemical property and structure of the rock during chemical weathering?

    <p>The rock becomes softer</p> Signup and view all the answers

    During chemical weathering, what happens resulting in the formation of a new mineral?

    <p>The rock's chemical properties change</p> Signup and view all the answers

    What role does chemical weathering play in the formation of new minerals from rocks?

    <p>It alters the chemical composition of the rock</p> Signup and view all the answers

    How does goethite contribute to chemical weathering and mineral formation in rocks?

    <p>By participating in the transformation of rocks into new minerals</p> Signup and view all the answers

    Which process leads to the formation of new minerals as a result of goethite's involvement in chemical weathering?

    <p>Oxidation</p> Signup and view all the answers

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