Chapter 22 Earth’s Interior

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Presentation transcript:

Chapter 22 Earth’s Interior

Earth’s Structure Ch 22.1 Page 660 The Science of Geology Page 660 1. Geology is the study of planet Earth, including its composition and structure.

Scientists who study the Earth and the processes that have shaped the Earth over time are called geologists 3. Uniformitarianism is the idea that the geologic processes that operate today also operated in the past

A Cross Section of the Earth Page 661

The Crust a. Rocky outer layer b. Made up of silicates (silicon and oxygen) c. 2 types- continental and oceanic d. 40 km in thickness

Oceanic vs Continental Oceanic Crust: App. 7 km thick More dense rocks Ocean floor Continental Crust: App. 40 km thick Less dense rocks Continents

The Mantle a. Beneath the crust, thick layer of hot solid rock b. 2850 km in thickness c. 3 layers- lithosphere (solid crust and upper mantle), asthenosphere (soft, “taffy like”), mesosphere

The Core Large sphere of metal that occupies Earth’s center 3480 km in thickness The outer core is liquid The inner core is solid because of the high amount of pressure

Layers of the Earth

Earth Layers Rap it out