Law of Superposition

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What is the Law of Superposition?

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The Law of Superposition states that in any undisturbed sequence of rocks, the oldest layers are at the bottom and the youngest layers are at the top.

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What does relative age mean in geology?

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Relative age refers to the age of a rock or fossil in comparison to other rocks or fossils, determined by the layers surrounding it.

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What type of evidence did Alfred Wegener use to support his theory of continental drift?

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Wegener used evidence from fossils, landforms, and climate to support his theory of continental drift.

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What is an example of evidence from fossils supporting continental drift?

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Fossils of the same species, such as the Mesosaurus, found on different continents indicate that these continents were once connected.

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What is the significance of sedimentary rock layers in understanding Earth's history?

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Sedimentary rock layers provide a record of past environments, climate changes, and biological activity over time.

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What is an igneous rock?

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Igneous rock is formed from the cooling and solidification of molten rock (magma or lava).

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What is the difference between absolute age and relative age?

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Absolute age is the actual age of a rock or fossil, often determined by radiometric dating, while relative age is its age compared to other rocks or fossils.

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What type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis?

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Evidence from human remains was not used by Wegener.

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What is a fossil?

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A fossil is the preserved remains or traces of ancient organisms, often found in sedimentary rocks.

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What are landforms?

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Landforms are natural features of the Earth's surface, such as mountains, valleys, and plateaus, that can provide evidence of geological processes.