Soil Worksheet-1

Soil Worksheet-1

Multiple-Choice Question:

1. Soil building begins with the physical fragmentation of:

(A) aggregate                                    (B) humus           

(C) parent material                          (D) lichens

2. Which of the following would we find underneath horizon C?

(A) topsoil                                          (B) subsoil          

(C) bedrock                                        (D) partially weathered rock

3. Which of the following would we find at horizon B?                 

(A) topsoil                                           (B) subsoil          

(C) partially weathered bedrock    (D) bedrock

4. The soil horizon that contains humus is:                            

(A) horizon B       (B) horizon C       (C) bedrock         (D) horizon A

5. To a scientist, _________ is a loose mixture of small mineral fragments and organic material.                  

(A) soil                                                 (B) parent rock

(C) humus                                           (D) bedrock

6. The decayed plant and animal material in soil is called:           

(A) horizon          (B) humus            (C) subsoil           (D) bedrock

7. The solid layer of rock beneath the soil is called:    

(A) bedrock                                        (B) humus 

(C) parent rock                                  (D) topsoil 

8. The soil horizon that is made up of partially broken bedrock is:

(A) horizon C       (B) horizon B       (C) horizon A       (D) bedrock

9. Which property of water directly causes mechanical weathering?    

(A) water can hold heat longer than soil

(B) water expands when it freezes

(C) water can form an acid when combined with some gases

(D) water dissolves many minerals

10. Which of the following is the lowermost layer and mainly consists of the parent rock?

(A) bedrock         (B) humus            (C) parent rock    (D) topsoil

Answer Key:

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