WorksheetsSoil Formation and Composition
Total questions: 15
Worksheet time: 15mins
The texture of soil depends mainly on
the types of plants that grow in the soil.
the size of the particles in the soil.
the color of the soil.
the number of worms in the soil.
When you dig a deep hole in the ground, you might notice that the deeper soil looks different. Which statement best describes what you would see in Horizon C?
Large and least weathered rock particles
Topsoil
Clay and minerals
Organic material such as leaves and sticks
Why do tropical, desert, temperate, and arctic soils all have different characteristics?
landforms
climates
horizons
abrasions
Which type of soil has the lowest permeability?
gravel
clay
sand
humus
The darker the soil the more...............it has
sand
clay
water
nutrients
A rock will weather more quickly in a hot, wet environment than in a cold, dry environment. This is an example of how...
climate affects soil formation
climate affects rock formation
Landforms affect soil formation
Landforms affect rock formation
A soil that has a high porosity would most likely contain:
silt
sand
humus
gravel/pebbles
By breaking down rocks with their roots, plants commonly cause what?
chemical weathering
mechanical weathering
exfoliation
abrasion
Which component of soil makes up about 45% of its composition?
Air
Water
Minerals
Organic Matter
Which component makes up approximately 5% of soil?
Air
Water
Minerals
Organic Matter
What are the three soil separates?
Sand
Silt
Clay
Gravel
What is the primary factor that influences the rate of soil formation?
Climate
Parent material
Topography
Biological activity
Which soil horizon is primarily composed of organic material?
Horizon A
Horizon B
Horizon C
Horizon O
Which process is responsible for the breakdown of rocks into smaller particles, contributing to soil formation?
Erosion
Weathering
Sedimentation
Compaction
What is the main component of loamy soil that makes it ideal for plant growth?
High sand content
Balanced mixture of sand, silt, and clay
High clay content
High silt content
