7.10A Vocabulary Evidence of Earth's Change Over Time

Front

What is the principle of superposition?

Back

The principle of superposition states that in an undisturbed sequence of sedimentary rock layers, the oldest layer is at the bottom and the youngest layer is at the top.

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NGSS.MS-ESS1-4

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What is a supercontinent?

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A supercontinent is a large landmass that consists of most or all of the continents fused together, existing long ago in Earth's history.

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Front

What does continental drift refer to?

Back

Continental drift is the theory that continents were once joined together as a single landmass and have since moved apart over geological time.

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NGSS.HS-ESS1-5

Front

What are tectonic plates?

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Tectonic plates are large, distinct pieces of Earth's lithosphere that move and interact with each other, causing geological activity such as earthquakes and volcanic eruptions.

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Front

Define sedimentary rock.

Back

Sedimentary rock is a type of rock formed by the accumulation and compaction of mineral and organic particles, often layered over time.

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NGSS.MS-ESS2-1

Front

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

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Fossils provide evidence of past life forms and environments, helping scientists understand how life and Earth have changed over time.

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Front

Explain the concept of geological time scale.

Back

The geological time scale is a system used by geologists to describe the timing and relationships of events in Earth's history, divided into eons, eras, periods, and epochs.

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NGSS.MS-ESS1-4

Front

What is the role of erosion in shaping the Earth's surface?

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Erosion is the process by which soil and rock are removed from the Earth's surface and transported to another location, shaping landscapes over time.

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NGSS.MS-ESS2-2

Front

What evidence supports the theory of plate tectonics?

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Evidence for plate tectonics includes the fit of continental coastlines, the distribution of earthquakes and volcanoes, and the presence of similar rock formations across continents.

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NGSS.MS-ESS2-3

Front

What is a fault in geological terms?

Back

A fault is a fracture or zone of fractures between two blocks of rock, allowing for movement and displacement, often associated with earthquakes.