Worksheets6.E.2 Soil
Total questions: 15
Worksheet time: 15mins
What is the source of organic material needed for most fertile soils?
moving water
eroded sand
decaying plants
weathered bedrock
The composition of soil influences the soil's ability to retain and transmit water and air. What soil type would be best for planting a productive garden?
Sandy soils because they provide high silica content.
Loamy soils because they contain sand and clay.
Slightly rocky soils because they provide needed materials.
Clay soils because they are heavy soils and repair water.
When microorganisms deplete the oxygen in soil through respiration, the soil becomes
humus
anaerobic
compost
aerobic
The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. The change in soil chemistry is a type of which process?
deposition
weathering
precipitation
photosynthesis
Humus is an organic material that makes up soil. Which characteristic best indicates that soil has a high humus content?
the color of the sample
the mass of the sample
the amount of the clay in the sample
the amount of rock in the sample
The finest grained soils are richest in
sand
humus
clay
iron
How cam the type of bedrock under soil affect the characteristics of the soil?
by preventing soil erosion
by absorbing excessive rainwater
by contributing small rock particles to the soil
by providing surface area for nutrient accumulation
Which is an example of a mixture?
oxygen
ice
soil
silver
Which is considered a property of soil?
streak
fracture
texture
luster
What should be added to soil to increase its water retention?
pebbles
sand
rocks
clay
A gardener wants to increase the ability of garden soil to retain water. Which of these should the gardener add to the soil?
course sand
loose gravel
nitrogen pellets
organic material
A student identifies a soil sample as "very gritty." What characteristic of the soil did the student describe?
texture
hardness
organic
water retention
Which soil component has the least capacity for holding water?
silt
clay
sand
humus
Soil conservation officers inspect fields on four farms. Each farmer uses a different method to protect his fields.Which farm has methods which would BEST prevent soil erosion?
where crops are planted in plowed straight rows
where each field is left unplanted every other year
where different crops are planted in plowed rows each year
where crops are planted within the remains of last year's crops
Soil will pack down over time which decreases the ability of soil to hold water. Which animals would best help the soil hold water?
earthworms making tunnels under the surface
cattle making depressions with their hooves
horses making trenches when they gallop
sheep pulling up plants by their roots
