Earth's Dynamic Geology

Estratto della scheda di revisione

Course Outline

  1. Earth's Layers
  2. Plate Boundaries
  3. Types of Plate Movements
  4. Volcano Types
  5. Earthquake Features
  6. Earthquake Measurement
  7. Volcanic Impacts
  8. Living Near Volcanoes

1. Earth's Layers

Key Concepts & Definitions

  • Inner Core: A solid ball composed primarily of iron and nickel, extremely hot, and under immense pressure, which keeps it in a solid state despite the high temperature.
  • Outer Core: A liquid layer surrounding the inner core, made of molten iron and nickel, responsible for generating Earth's magnetic field.
  • Mantle: The thickest layer of Earth, made of semi-molten rock called magma, which flows slowly and drives plate movements through convection currents.
  • Oceanic Crust: The thinner, denser, and younger part of Earth's crust that sinks beneath continental crust during subduction.
  • Continental Crust: The thicker, older, and less dense part of Earth's crust that floats on the mantle and forms continents.

Essential Points

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Anteprima del quiz

1. In what year did Giuseppe Mercalli develop the scale used to measure earthquake intensity based on observed effects?

2. When was the scientific classification of volcanoes into shield and composite types most widely established?

3. What are some of the major effects or consequences of volcanic eruptions?

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Anteprima delle flashcard

Earth's innermost layer —?

Solid, mainly iron and nickel

Outer core —?

Liquid, generates Earth's magnetic field

Mantle —?

Semi-molten rock, drives plate movement

Oceanic crust —?

Thin, dense, young crust

Continental crust —?

Thick, less dense, older crust

Destructive boundary —?

Plates converge, causes subduction and volcanoes

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