AGRICULTURAL SCIENCE SS1
  • 1. The hard unweathered rock layer is known as
A) Horizon I
B) Horizon S
C) Horizon K
D) Horizon R
  • 2. Soil profile is best described as
A) vertical section of soil
B) horizontal section of soil
C) soil structure
D) soil texture
  • 3. Limestone is an example of
A) Volcanic ash
B) Metamorphic rock
C) Sedimentary rock
D) Igneous rock
  • 4. The process by which rocks break down to form soil is called
A) Sedimentation
B) Weathering
C) Erosion
D) Compaction
  • 5. Rocks are best defined as
A) organic farm materials
B) solid materials made of minerals
C) liquid materials in the soil
D) decayed plants
  • 6. Simple farm tools are mainly operated by ______
A) Electricity
B) Engine
C) Hand
D) Battery
  • 7. Which rock is formed from magma?
A) Metamorphic
B) Igneous
C) Sedimentary
D) Limestone
  • 8. Soil formation is the process by which soil develops from
A) fertilizers
B) Soils
C) Limestock
D) parent rocks
  • 9. Which of the following is NOT a type of weathering?
A) Biological
B) Mechanical cultivation
C) Physical
D) Chemical
  • 10. The downward movement of soluble minerals in soil is called
A) deposition
B) weathering
C) erosion
D) leaching
  • 11. The soil horizon richest in humus is
A) Horizon A
B) Horizon S
C) Horizon B
D) Horizon K
  • 12. Marble is formed from
A) Sandstone
B) Basalt
C) Granite
D) Limestone
  • 13. The major components of soil do not include
A) Water
B) None of the above
C) Organic matter
D) Mineral matter
  • 14. Soil texture refers to the
A) Depth of soil
B) Arrangement of soil particles
C) Size of soil particles
D) Colour of soil
  • 15. Which soil property affects water retention?
A) Texture
B) Salinity
C) pH
D) Colour
  • 16. Clay soil is best described as
A) ticky when wet
B) Loose and gritty
C) Well drained
D) Poor in nutrients
  • 17. Horizon R is
A) Bedrock
B) Parent material
C) Topsoil
D) Organic layer
  • 18. ___ tool is used for gathering and leveling soil
A) Cutlass
B) Rake
C) Axe
D) Hoe
  • 19. Horizon O
A) Organic layer
B) Bedrock
C) Parent material
D) Topsoil
  • 20. ____ is the ability of soil to retain water for plant use
A) Water holding capacity
B) Structure
C) Texture
D) Porosity
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