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The Earth

The Earth. The Earth from a global perspective. Why is it the way it is, what makes it different or similar to other planets? Earth from space – first seen in 1957 Imagine you’re an alien from another planet…. Distinguishing features of Earth (compared to other planets): - water

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The Earth

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  1. The Earth

  2. The Earth from a global perspective • Why is it the way it is, what makes it different or similar to other planets? • Earth from space – first seen in 1957 • Imagine you’re an alien from another planet…

  3. Distinguishing features of Earth (compared to other planets): - water - vegetation - clouds  tranquil place

  4. Desert - Namibia

  5. Drainage patterns - Yemen

  6. Grand canyon from space

  7. Impact craters – Manicoagan crater - Quebec

  8. Mountains – Sierra Nevada from space

  9. Volcanoes – radar image of Mauna Loa from space

  10. Pyramids from space

  11. Earth at night

  12. Earth’s surface: constantly changing

  13. Similar Fossils Found on different Continents!

  14. Similar Rock Formations Found on different continents!

  15. 250 Million Years Ago- Pangea

  16. M

  17. Where does the energy for plate tectonics come from? Energy from Earth’s interior

  18. Radioactive Decay

  19. Earth was most likely MOLTEN early in its history • Energy sources to keep Earth molten throughout • - decay of radioactive isotopes (atoms) from early solar system • - violent impacts from solar system formation debris • numerous asteroids, meteoroids

  20. chemical differentiation” – heavier elements sink down lower in the structure core = made of IRON mantle = dense, iron-rich, but other lighter elements crust = relatively thin, light, silicon-rich materials

  21. Earth’s Atmosphere

  22. Earth’s Atmosphere

  23. Early Earth’s Atmosphere

  24. Rock Formation Process

  25. Zircon Earth's oldest-known mineral -Over 4 billion Years old. We can figure out under what conditions it formed.

  26. CO2 Cycle

  27. Magnetosphere • Magnetic Field roughly aligned with its rotation axis • Charged particles from the Sun can interact with the Earth's field and change its shape

  28. Aurora

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