Soil Worksheet-3

Soil Worksheet-3


Multiple-Choice Question:

  1. The single most effective agent of chemical weathering at the Earth's surface is:

(A) hydrochloric acid                       (B) water            

(C) carbon dioxide                           (D) carbonic acid


  1. The normal pH of rainwater is about:

(A) 7.0                  (B) 3.0                  (C) 8.2                  (D) 5.5


  1. What is the parent material of all soils?

(A) Rock               (B) Clay                (C) Minerals        (D) Regolith


  1. Compost helps preserve the fertility of soil because it:

(A)contains pesticides that kill insects

(B) is a natural fertilizer

(C) adds artificial fertilizers that help plants grow

(D) breaks rock down into additional soil


  1. Which of these factors affect the rate of weathering?

(A) chemical composition of the exposed rock

(B) surface area of the exposed rock

(C) climate

(D) all of these


  1. Why can a heavy rain shower cause a large amount of erosion in a desert area?

(A) Desert ground cannot absorb any water.

(B) Streams overflow easily.

(C) Temperatures are very high.

(D) There is a lack of vegetation to hold the soil in place.


  1. One way that mining for mineral resources damage the land is by:

(A) causing salinization                  

(B) adding greenhouse gases to the environment

(C) increasing soil erosion

(D) depleting the world’s ozone


  1. Of all the basic soil forming process, which of the following is an example of the synthesis of humus from leaf litter?

(A) losses                                          (B) additions                

(C) transformations                         (D) translocations


  1. The "weathering" of rocks and minerals refers to:

(A) the formation of soil horizon distinctions because of the effects of rain, snow, freezing temperatures, heat, atmospheric pressure, and other weather-related conditions

(B) the joining of basic elements in the earth's crust to form the minerals found in igneous rocks

(C) their physical breakup into smaller particles and their chemical alteration into dissolved ions and new types of minerals

(D) all of these are correct


  1. Removal of small pieces of disintegrated rock in nature is called:

(A) mechanical weathering

(B) erosion

(C) chemical weathering


Answer Key:

  1. (D)
  2. (D)
  3. (A)
  4. (B)
  5. (D)
  6. (C)
  7. (A)
  8. (C)
  9. (C)
  10. (B)