Soil Permeability

Which surface soil conditions allow the most infiltration of rainwater?

• steep slope and permeable soil
• steep slope and impermeable soil 
• gentle slope and permeable soil
• gentle slope and impermeable soil

Sand sediments are usually more permeable than silt sediments because sand grains are...

• larger
• smoother
• rounder
• more soluble

Which diagram represents the soil with the greatest permeability?

• Choice 1
• Choice 2
• Choice 3
• Choice 4

Soil with the greatest porosity has particles that are...

• poorly sorted and densely packed
• poorly sorted and loosely packed
• well sorted and densely packed
• well sorted and loosely packed

In which sediments is the capillary action of water greatest?

• silt and sand
• sand and pebbles
• pebbles and cobbles
• cobbles and boulders

Which set of conditions would produce the most runoff of precipitation?

• gentle slope and permeable surface
• gentle slope and impermeable surface
• steep slope and permeable surface
• steep slope and impermeable surface

Which graph shows the effect of soil permeability on the amount of runoff in an area?

• Choice 1
• Choice 2
• Choice 3
• Choice 4

Which conditions produce the most surface water runoff?

• steep slope, heavy rain, and frozen ground
• steep slope, gentle rain, and unfrozen ground
• gentle slope, heavy rain, and frozen ground
• gentle slope, gentle rain, and unfrozen ground

Which property of loose earth materials most likely increases as particle size decreases?

• capillarity
• infiltration
• permeability
• porosity

Which soil condition allows the most infiltration of precipitation?

• saturated soil
• a steep soil surface
• coarse-grained soil
• an impermeable surface