TeXes Science Practice Test

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What process changes and preserves hard parts of prehistoric objects?

Recrystallization
Petrification
Metamorphosis
Mineralization

The correct answer is: Recrystallization

The process that changes and preserves hard parts of prehistoric objects is mineralization. This process occurs when the organic material of an object, such as bones or wood, is replaced by minerals over time, essentially turning them into stone. The original cellular structure of the object can often be maintained while the organic components are gradually replaced by minerals, preserving the object's details and form. This preservation method is significant for the study of fossils and ancient organisms, as it allows scientists to analyze the past ecosystems and biological characteristics of these entities through their hard parts. While recrystallization, metamorphosis, and even elements of petrification involve changes to an object's form or composition, mineralization specifically denotes the replacement and preservation of the original hard structure through mineral deposits, making it the most accurate choice for the transformation and preservation of prehistoric remains.