Relative and absolute dating review for flashcard

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What is relative dating?

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Relative dating is a method used to determine the age of rocks and fossils in relation to one another, without providing a specific numerical age.

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What is absolute dating?

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Absolute dating is a method used to determine the actual age of a rock or fossil in years, often through techniques like radiometric dating.

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What does the law of superposition state?

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The law of superposition states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

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What is radiometric dating?

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Radiometric dating is a technique used to date materials by comparing the abundance of a radioactive isotope to its decay products.

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What is an intrusion in geology?

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An intrusion is a body of igneous rock that forms when magma pushes into existing rock layers and solidifies.

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How can you determine which layer is older?

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You can determine which layer is older by using relative dating principles, such as the law of superposition and cross-cutting relationships.

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What is a fossil?

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A fossil is the preserved remains or traces of a once-living organism, often found in sedimentary rock.

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What is the significance of the oldest fossils?

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The oldest fossils provide important information about the early life forms on Earth and the conditions of the environment at that time.

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What is the difference between relative age and absolute age?

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Relative age compares the age of rocks and fossils to one another, while absolute age provides a specific age in years.

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What is a sedimentary rock?

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Sedimentary rock is formed from the accumulation and compaction of mineral and organic particles, often containing fossils.