Dr. Sabin's Earth and Space Science
Unit 3: Geologic Time

Unit 3 Overview
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Concepts
Essential Questions
1.
Geology
1.

How have the geologic sciences developed over time?
2.

Geologic dating

2.

How can scientists determine ages of geologic material?

3.
Geologic Time
3.

How do scientists use the geologic time scale to understand and describe natural history?

4.
Continental Drift
4.
How does the concept of continental drift help explain the world?
5.
Plate Tectonics
5.

How does the theory of plate tectonics help explain the world?

Important Terminology

catastrophism, uniformitarianism, relative age, absolute age, law of superposition, unconformity, law of crosscutting relationships, varves, radiometric dating, isotopes, decay, half-life, era, period, epoch, Precambrian, Paleozoic, Mesozoic, mass extinction, Cenozoic, continental drift, mid-ocean ridge, sea-floor spreading, paleomagnetism, plate tectonics, lithosphere, asthenosphere, divergent, convergent, transform, rifting, terrane, supercontinent cycle, Pangaea, Laurasia, Gondwanaland, subduction, trench, convection

 
10.09.07 / 10.10.07
Development of Geology
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10.11.07 / 10.12.07
Dating Methods
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10.15.07 / 10.16.07
Geologic Time
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