Geologists infer from the rounded, eroded shapes of the Appalachain Mountains that_________.

A marble statue is left exposed to weather. Within a few years, the details of the statue have begun to weather away. This weathering is probably caused by________.

Granite lasts a long time when it is used for building in areas where_________.

The most important factors in determining the rate of weathering are_________.

When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of__________.

In a cross section of soil, the B horizon consists of_________.

Most of the work of mixing humus within the soil is done by__________.

The type of soil called loam is made up of___________.

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?

A river flowing across a wide flood plain begins to form looplike bends called

What causes rock to break down as it moves from the bedrock to the A horizon?

The process in which rock fragments freeze to the bottom of a glacier and then are carried away when the glacier moves is called

The process by which natural forces move weathered rock and soil from one place to another is called

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