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The Study of Earth’s History

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Presentation transcript:

Video 1

Questions 1 & 2 What are three things you saw in video 1? What do all of the clips in video 1 have in common?

Video 2

Questions 3 & 4 What are three things you saw in video 2? What do both videos have in common?

Notes: Earth Changes EQ: How do we categorize changes to the Earth?

How does Earth Change? For 1000s of years humans have wondered about Earth’s history. 2 main view points: 1. the Earth was shaped suddenly 2. the Earth was shaped slowly over billions of years. This argument is known as catastrophism vs uniformitarianism.

Catastrophism Catastrophism- principle that states all geologic change occurs suddenly Evidence- Biblical floods, asteroid strikes and other catastrophes created mountains, canyons, and seas.

Examples of Catastrophism Earthquakes Tsunamis Volcanic Eruptions

Uniformitarianism Uniformitarianism- principle that states the same geologic processes shaping Earth today have been working throughout Earth’s history. Evidence: Weathering, erosion and other geologic processes happen slowly. Therefore the Earth must have been shaped slowly.

Examples of Uniformitarianism weathering- the breakdown of rock erosion- the movement of weathered rock deposition- the dropping off of weathered rock **** these all happen many ways… more on this later

Real Life Earth has been shaped by a combination of catastrophism & uniformitarianism. Most geologic change is slow & gradual. But catastrophes have contributed to shaping Earth.

Copy and Complete How does the Earth change? Catastrophism Uniformitarianism Real life How does the Earth change? How fast do the changes take place? What evidence do we have?