Lujan Soils Question Preview (ID: 42139)


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What is the dark, organic material that helps make soil fertile?
a) humus
b) bedrock
c) horizons
d)

Soil is made by
a) The roots hold the soil together
b) The soil hurts the roots
c) The roots cannot break though soil
d)

The material from which soil forms is called
a) Parent material
b) humus
c) Boulders
d)

How freely water moves through soil is called
a) Permeability
b) Ph
c) Soil texture
d)

process that carries materials such as iron minerals and clay from the A horizon to the B horizon as a result of water seeping down, or moving through
a) leaching
b) soil pH
c) soil texture
d) soil fertility

a vertical section of soil that shows soil horizons, or layers of soil
a) soil profile
b) soil horizon
c) soil chemistry
d) soil texture

the largest layer of weathered rock fragments with little or no organic matter from which soil is formed; lies directly above the parent rock/bedrock
a) subsoil - horizon B
b) parent rock/regolith - horizon C
c) topsoil - horizon A
d) litter - horizon O

The loss of topsoil due to rain, ice, and wind is referred to as __________.
a) weathering
b) deforestation
c) clear-cutting
d) weathering

Burrowing animals, such as earthworms and moles, increase the rate of weathering, loosen and mix the soil, increasing the amount of air to enter and the ability of the soil to drain water.
a) True
b) False
c)
d)

Imagine that you are a farmer. You own many acres of land, but much of it is not arable because it lacks nutrients that crops need to survive. Which of the following strategies would you use to make your land arable?
a) Plant crops on the land and hope that some survive.
b) Develop a new irrigation system to provide more water for your crops.
c) Use fertilizers to provide your crops with nutrients.
d) Plant crops on the land and hope that some survive.

Which of the following statements is true?
a) The world’s arable farmland is unevenly distributed.
b) Every country has the same resources available for growing food.
c) Every climate is suitable for food production.
d) Any type of soil is suitable for growing crops.

The forests of central China are the giant panda’s natural habitat. Lately, the Chinese have deforested this area to make room for growing cities. How might this deforestation affect the giant panda’s survival?
a) It will shrink the giant panda’s habitat, making survival more difficult.
b) It will benefit plant species that the giant panda eats, making survival easier.
c) It will increase the giant panda’s habitat, making survival much easier.
d) It will make room for neighborhoods and shopping centers, making survival easier.

The nutrients in topsoil that support plant growth come from __________.
a) plant and animal matter that is decaying
b) minerals trapped inside of rocks
c) materials located below the Earth’s outer crust
d) pesticides used by farmers

Which of the following statements best describes a consequence of deforestation?
a) Deforestation causes soil to lose vegetation, allowing heavy rains to wash away the topsoil
b) Deforestation causes precipitation, which helps topsoil to maintain its nutrients for further plant growth.
c) Deforestation protects the habitats of many plant species, some of which are used to make important medicines.
d) Deforestation allows too much oxygen to be released into the atmosphere, making the atmosphere too clean

Which statement describes the most likely effect for a country with a large population and a small amount of arable land?
a) It struggles to produce enough food to support its population.
b) It pays less for food than countries with more arable land do
c) It exports most of its food to other countries.
d) It produces more food than can be used.

What effect do plants' roots have on soil?
a) weathering of rocks and organic matter
b) meteoroid impacts
c) organic matter only
d)

Increasing vegetation will cause erosion to
a) decrease
b) increase
c) stay
d) increase and later decrease

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