3.1 Pangea, Geological Time-Scale & Fossil Record

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What is Pangea?

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Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, where all the continents were joined together.

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

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Wegener used evidence from the fit/shape of continents, geological similarities, fossil records, and climate changes.

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Which two continents fit together most noticeably?

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South America and Africa.

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What does the fossil record tell us about past environments?

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The fossil record can indicate what types of organisms lived in an area and what the environment was like, such as whether it was once covered by water.

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What is a mass extinction?

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A mass extinction is the end of life for a large number of species in a relatively short period of time.

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According to the law of superposition, where are the oldest fossils found?

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The oldest fossils are found near the bottom of the rock layers.

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What is the significance of fossils in understanding Earth's history?

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Fossils provide evidence of past life and help scientists understand the evolution of species and changes in the environment.

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What is geological time scale?

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The geological time scale is a system of chronological dating that relates geological strata to time, dividing Earth's history into eons, eras, periods, and epochs.

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How do scientists use fossils to infer past climates?

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Scientists analyze the types of fossils found in rock layers to infer the climate conditions that existed when those organisms were alive.

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What is continental drift?

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Continental drift is the theory that continents move across the Earth's surface over geological time.