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Earth’s Interior

Explore the fascinating world of geology and uncover the secrets of Earth's interior. Learn what geologists do, discover the main layers of the planet's surface, and understand the characteristics of the crust, mantle, and core. Delve into the forces that shape the Earth's surface and examine evidence of its interior. Gain insights into seismic activity, temperature, pressure, and the composition of the three main layers: crust, mantle, and core. Unveil the mysteries of Earth's formation and its shielding from harmful radiation.

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Earth’s Interior

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  1. Earth’s Interior By Bobby Robinson

  2. Guide For Reading • What does a geologist do? • What are the main layers of Earth’s surface? • What are the characteristics of Earth’s crust, mantle, and core?

  3. Geologists examine the layers of Earth to answer what three questions? • How old is Earth? • How has Earth’s surface changed over time? • Why are there oceans, and how did they form?

  4. Geologists divide the forces that change the earth’s surface into two groups: • Constructive forces • Examples? • Destructive forces • Examples?

  5. Evidence of Earth’s Interior • Direct- drilling for rock samples • Indirect- Seismic waves • Primary waves-fastest ->Longitudinal movement • Secondary waves-> traverse movement • Surface waves-most destructive-

  6. Seismic Activity Today

  7. Temperature • Near the surface would be cool • 20 meters down the rock gets warmer • For every 40 meters that descends a temperature increases 1°C

  8. Pressure • The pressure increases as you go deeper inside the earth because amount and weight of the rock increases

  9. Earth’s layers • The three main layers make up Earth’s interior: • The crust • The mantle • The core

  10. Crust • Outer layer of earth • Consist of oceanic and continental crust • Oceanic is made of basalt-a dense, dark, fine coursed rock. • Continental is made of granite.

  11. Mantle • Largest part of earth’s makeup • Consist of lithosphere and Asthenosphere • Lithosphere: The upper most mantle and the crust form a solid rigid • Asthenosphere: The soft portion of the mantle in which the lithosphere floats

  12. Core • Inner core – dense iron and nickel, solid ball • Outer core- molten iron and nickel • Shields earth from harmful radiation from the sun.

  13. Thank You Core!!!

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