SOIL SCIENCE EXAMINATION QUESTIONS AND CORRECT ANSWER WITH EXPLANATION GRADED A+ STUDY GUIDE

SOIL SCIENCE EXAMINATION QUESTIONS AND CORRECT
ANSWER WITH EXPLANATION GRADED A+ STUDY GUIDE
SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Soil science is the study of:
A. Soil properties and processes
B. Weather systems
C. Ocean currents
D. Air pollution only
Answer: A
Rationale: It focuses on soil formation, classification, and management.

2. Soil is formed from:
A. Weathered rocks and organic matter
B. Only water
C. Only air
D. Only animals
Answer: A
Rationale: Soil develops from rock weathering and organic decay.

3. The process of soil formation is called:
A. Pedogenesis
B. Photosynthesis
C. Evaporation
D. Sedimentation
Answer: A
Rationale: Pedogenesis is soil development.

4. Parent material refers to:
A. Original rock material forming soil
B. Fertilizer
C. Water source
D. Air content
Answer: A
Rationale: Source material for soil formation.

5. Soil profile is:
A. Vertical section of soil layers

, B. Horizontal map
C. Weather chart
D. Rock surface
Answer: A
Rationale: Shows soil horizons.

6. Soil horizon is:
A. Distinct soil layer
B. River layer
C. Air layer
D. Cloud layer
Answer: A
Rationale: Different soil layers.

7. Topsoil is also called:
A. A horizon
B. B horizon
C. C horizon
D. Bedrock
Answer: A
Rationale: Upper fertile layer.

8. Subsoil is:
A. B horizon
B. A horizon
C. O horizon
D. Rock layer
Answer: A
Rationale: Layer below topsoil.

9. Bedrock is:
A. Unweathered rock layer
B. Soil layer
C. Organic layer
D. Water layer
Answer: A
Rationale: Solid rock beneath soil.

10. Organic matter in soil is called:
A. Humus

, B. Sand
C. Clay
D. Silt
Answer: A
Rationale: Decomposed organic material.

11. Soil texture refers to:
A. Proportion of sand, silt, clay
B. Color of soil
C. Soil temperature
D. Soil smell
Answer: A
Rationale: Particle size distribution.

12. Soil structure refers to:
A. Arrangement of soil particles
B. Soil color
C. Soil depth
D. Soil temperature
Answer: A
Rationale: Particle aggregation.

13. Soil porosity is:
A. Pore space in soil
B. Soil color
C. Soil weight
D. Soil temperature
Answer: A
Rationale: Space for air and water.

14. Soil permeability is:
A. Ability of water to pass through soil
B. Soil color
C. Soil hardness
D. Soil smell
Answer: A
Rationale: Water movement capacity.

15. Sandy soil has:
A. Large particles and good drainage