If rock layers are left undisturbed, the oldest layer lies at the bottom.

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Study for the California Science Test. Get ready for the 8th grade exam with flashcards and multiple choice questions, each question has hints and explanations. Prepare with confidence!

Multiple Choice

If rock layers are left undisturbed, the oldest layer lies at the bottom.

Explanation:
When rock layers are left undisturbed, each new layer forms on top of the older ones, so the oldest material ends up at the bottom. This is relative dating, which orders rocks by age without giving exact numbers. It’s different from absolute dating, which assigns specific ages using methods like radiometric dating. The Geological Time Scale is a broad framework of Earth's history built from many dating results, not the dating method itself. Observations refer to what we notice about rocks, but by itself doesn’t specify how to determine the ages.

When rock layers are left undisturbed, each new layer forms on top of the older ones, so the oldest material ends up at the bottom. This is relative dating, which orders rocks by age without giving exact numbers. It’s different from absolute dating, which assigns specific ages using methods like radiometric dating. The Geological Time Scale is a broad framework of Earth's history built from many dating results, not the dating method itself. Observations refer to what we notice about rocks, but by itself doesn’t specify how to determine the ages.

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