1 Crust 2 Mantle 3 Core Watch the

1. Crust 2. Mantle 3. Core

Watch the movie trailer for JOURNEY TO THE CENTER OF THE EARTH. What characteristics do you think are true? Which do you think are not true?

§ Layer of rock that forms “outer skin” of Earth § Made of solid rock § Includes Dry land § Includes Ocean floor § On the crust you will find: § Rocks/mountains § Soil § Water

§ Outer “rind” of rock is thinner than the layer beneath it § Crust is thickest under high mountains § Crust is thinnest under the ocean § Oceanic crust § Crust beneath ocean § Consists of rocks such as BASALT § Dark rock with fine texture § Continental crust § Forms the continents § Consists of granite which is a light color and has a course texture

§Located beneath crust §About 40 km beneath surface §Made of solid material-a layer of hot rock §Divided into to 3 layers §Lithosphere §Asthenosphere §Lower mantle

§Uppermost part of mantle §Similar to crust §Uppermost part of the mantle and the crust together =lithosphere §About 100 km thick and made of stone

§Material is hotter and under increasing pressure §Softer than the rest of the mantle but still solid §Mantle just beneath the lithosphere is less rigid than the rock above §Somewhat soft and can be soft and bendable like plastic

§Beneath the asthenosphere §Solid §Extends to Earth’s core

§Made of mostly metals (iron and nickel) § 2 parts: §Liquid outer core §Solid inner core

§Layer of molten metal §Surrounds inner core §Under enormous pressure §Liquid layer

§ Dense ball of solid metal § Extreme pressure squeezes the atoms of iron and nickel so much that they cannot spread out and become liquid § In addition to nickel and iron, the inner core also contains § Oxygen § Sulfur § Silicon

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Layers of the Earth – Apple Analogy How would you compare the layers of the Earth to an apple? Skin: CRUST Flesh: MANTLE Core: OUTER CORE Seeds: INNER CORE

This Photo by Unknown Author is licensed under CC BY-NC-ND