SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
A soil with 25% _____ and 25% ______by volume is close to
ideal
-water; organic matter
-Air; mineral matter
-Air; water
-Mineral matter; organic matter - Correct Answer ✅Air;
water
Soil is a dynamic natural body having properties due to the
combined effects of _______ and biota as modified by ________
acting on parent material over time.
-climate; topography
-Time; Weather
-Topography; parent material
-Biota; climate
-Weather; topography - Correct Answer ✅climate;
topography
A soil that supports plant life must provide _____to the roots
of the plants
,SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
-growth hormones
-Energy sources
-Nitrogen gas (i.e., N2)
-Carbon dioxide
-Oxygen - Correct Answer ✅Oxygen
Soil forming factors always act alone usually one at a time. -
Correct Answer ✅This is false. Soil forming factors typically
affect soil formation simultaneously. Some factors may
dominate more than others, but usually soil formatting is a
result of combined effects of these factors
A soil contains A, E, B, and C master horizons. The A, E, and B
horizons are considered ____?
-Subsoil
-Soil pedon
-Soil profile
-Surface soil
-Soil solum - Correct Answer ✅Soil solum
,SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
Which of the following are influenced by one or more
functions of soil?
-accumulation/degradation of leaves and other plant residues
-Ability to support plant and microbial life
-All of the answers are a result of one or more major soil
functions
-Regulation of rain entering streams and rivers
-Quality of water in streams and rivers - Correct Answer
✅All of the answers are a result of one or more major soil
functions
A two dimensional (i.e., 2D) view of soil that displays horizons
is referred to as a soil
-Horizon
-Pedon
-Profile
-Regolith
-Solum - Correct Answer ✅profile
, SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
Which element is not essential for plants and is a common
constituent of soil minerals?
-Mg (magnesium)
-Al (aluminum)
-Na (sodium)
-K (potassium)
-Ca (calcium) - Correct Answer ✅Al (aluminum)
Secondary minerals that are resistant to further weathering,
such as hematite and gibbsite, are in the group of minerals
called ________, which are usually found in high quantities in
extremely old and highly weathered soils.
-Fe and Al oxides
-Si and Ca carbonates
-Ca and Mg carbonates
-K and N
-Silicates and Mg carbonates - Correct Answer ✅Fe and Al
oxides
Which answer includes only secondary minerals?
Answers (Latest Update 2025)
A soil with 25% _____ and 25% ______by volume is close to
ideal
-water; organic matter
-Air; mineral matter
-Air; water
-Mineral matter; organic matter - Correct Answer ✅Air;
water
Soil is a dynamic natural body having properties due to the
combined effects of _______ and biota as modified by ________
acting on parent material over time.
-climate; topography
-Time; Weather
-Topography; parent material
-Biota; climate
-Weather; topography - Correct Answer ✅climate;
topography
A soil that supports plant life must provide _____to the roots
of the plants
,SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
-growth hormones
-Energy sources
-Nitrogen gas (i.e., N2)
-Carbon dioxide
-Oxygen - Correct Answer ✅Oxygen
Soil forming factors always act alone usually one at a time. -
Correct Answer ✅This is false. Soil forming factors typically
affect soil formation simultaneously. Some factors may
dominate more than others, but usually soil formatting is a
result of combined effects of these factors
A soil contains A, E, B, and C master horizons. The A, E, and B
horizons are considered ____?
-Subsoil
-Soil pedon
-Soil profile
-Surface soil
-Soil solum - Correct Answer ✅Soil solum
,SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
Which of the following are influenced by one or more
functions of soil?
-accumulation/degradation of leaves and other plant residues
-Ability to support plant and microbial life
-All of the answers are a result of one or more major soil
functions
-Regulation of rain entering streams and rivers
-Quality of water in streams and rivers - Correct Answer
✅All of the answers are a result of one or more major soil
functions
A two dimensional (i.e., 2D) view of soil that displays horizons
is referred to as a soil
-Horizon
-Pedon
-Profile
-Regolith
-Solum - Correct Answer ✅profile
, SCSC 301 exams 1,2,3,4 Questions and
Answers (Latest Update 2025)
Which element is not essential for plants and is a common
constituent of soil minerals?
-Mg (magnesium)
-Al (aluminum)
-Na (sodium)
-K (potassium)
-Ca (calcium) - Correct Answer ✅Al (aluminum)
Secondary minerals that are resistant to further weathering,
such as hematite and gibbsite, are in the group of minerals
called ________, which are usually found in high quantities in
extremely old and highly weathered soils.
-Fe and Al oxides
-Si and Ca carbonates
-Ca and Mg carbonates
-K and N
-Silicates and Mg carbonates - Correct Answer ✅Fe and Al
oxides
Which answer includes only secondary minerals?
