地质学 TPO37-L1 Soil Formation

地质学

TPO37-L1 Soil Formation

Listen to part of a lecture in the geology class.

 



  1. What is the lecture mainly about?
  • A. The differences between mineralization and weathering.
  • B. Processes that remove minerals from soil.
  • C. Factors affecting the fertility of soil.
  • D. Several processes involved in the creation of soil.

 

  1. What differences does the professor point out between sand particles and clay minerals?
    [CHOOSE 2 ANSWERS]
  • A. They combine with organic matter in different ways.
  • B. They are formed by different types of weathering.
  • C. The rocks they come from have different levels of resistance to weathering.
  • D. Only sand particles have the same composition as the rock they come from.

 

  1. What does the professor point out about the compounds found in organic matter?
  • A. They mineralized at different rates.
  • B. They may resist combining with minerals in the soil.
  • C. They occur in roughly equal amounts in plant tissue.
  • D. They contain chemicals that are also found in inorganic materials.

 

  1. Why does the professor mention the dark brown color of soil?
  • A. To explain that soil gets its color mainly from inorganic inputs.
  • B. To indicate that humus is more easily transformed than the other components of soil.
  • C. To show how the transformation and combination of inputs create the characteristics of soil.
  • D. To discuss how the characteristics of humus are changed by weathering.

 

  1. According to the professor, how does water affect the composition of soil?
    [CHOOSE 2 ANSWERS]
  • A. It prevents new soil material from being incorporated.
  • B. It separates the components of soil into layers.
  • C. It causes chemical changes in the soil’s organic material.
  • D. It can cause the loss of some of the soil material.

 

  1. Why does the professor say this: 🎧
  • A. To draw attention to the complexity of soil formation.
  • B. To stress the importance of organic matter in soil formation.
  • C. To imply that soil contains other, more important components.
  • D. To indicate one way soil can be formed.



答案:
D BD A C BD A


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