In which layer of soil in the illustration would you find humus? What is the soil in this layer called?
In which layer of soil in the illustration would you find humus? What is the soil in this layer called?
When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of
The process of restoring an area of land to a more natural, productive state is called
Landslides, mudflows, slump, and creep are all examples of
Granite lasts a long time when it is used for building in areas where
The process by which natural forces move weathered rock and soil from one place to another is called
Geologists infer from the rounded, eroded shapes of the Appalachian Mountains that
In a cross section of soil, the B horizon consists of
A marble statue is left exposed to the weather. Within a few years, the details on the statue have begun to weather away. This weathering probably is caused by
The type of soil called loam is made up of
Some plants produce acids that result in
Sandy topsoil is said to be
The actions of animals most commonly can cause the type of weathering known as
Water and wind can
Two factors that determine the rate of weathering are the type of rock and the
Creep is very slow movement of sediment down a slope.
To restore soil’s fertility, a farmer might plant legumes as part of a soil conservation technique called nutrient depletion.
A type of land use called mining involves the removal of nonrenewable resources from the land
The movement of rock particles by ice, wind, water, or gravity is called weathering.
After chemical weathering, the chemical makeup of the weathered rock is the same as that of the original rock.
Most of the work of mixing humus within the soil is done by
What can cause the loss of soil that is not protected by plant cover?
Plowing removed the grass from the Great Plains and exposed the soil. What effect did this have when a drought struck the Great Plains during the 1930s?
In which layer of soil in the illustration would you find humus? What is the soil in this layer called?
Using the above diagram, Which layer of soil in the illustration is made up only of partly weathered rock? What is this layer called?
Describe three ways farmers can prevent nutrient depletion.
How are landslides and mudflows similar? How are they different?
For hundreds of years, an ancient statue had been kept outdoors in a country with a dry, mild climate. A U.S. city bought the statue and placed it outdoors in a park. The city has hot, rainy summers, freezing winter temperatures, and air pollution from the burning of coal in a power plant. Predict how the city’s climate will affect the weathering of the statue
Why is soil so important to people and living things?