In Terms of Migration Within the United States,the Region of the Country

question 89

Multiple Choice

In terms of migration within the United States,the region of the country most often left behind is

• A)the heartland or Great Plains,from North Dakota down to Texas.
• B)the South.
• C)the West Coast,from Washington down to California.
• D)the Southeast.

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Definitions:

Silicon

The fourteenth element in the Periodic Table, having the atomic symbol Si.

Silica Tetrahedra

The basic structural unit of silicate minerals, consisting of four oxygen atoms surrounding a single silicon atom.

Silicate Minerals

A group of minerals that contain silicon and oxygen, usually with other metals, forming the largest and most important class of minerals on Earth.

Double Chains

Structures consisting of two parallel chains of atoms or molecules bonded together, often found in silicate minerals.