| The New Dictionary of Cultural Literacy, Third Edition. 2002. |
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| core |
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| In geology, the central region of the Earth; it extends fourteen hundred to eighteen hundred miles from the Earth’s center. | 1 |
| ‡ The core is made primarily of iron and nickel and has two parts—an inner solid core and an outer liquid core. | 2 |
| ‡ The mantle is the layer of the Earth that overlies the core. | 3 |
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| | | The New Dictionary of Cultural Literacy, Third Edition. Edited by E.D. Hirsch, Jr., Joseph F. Kett, and James Trefil. Copyright © 2002 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
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