outer core

Definition:

n. a liquid layer about 2266 kilometers thick composed of iron and nickel which lies above the Earth's solid inner core and below its mantle

Sentence:

The outer core is so hot that the metal is always molten.

More example sentences:

The outer core is so hot that the metal is always molten.

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Synonyms:

liquid earth layer; layer above the inner core; layer below the mantle

Antonyms:

sky