1. Earth’s Interior
Chapter 5 Section 1

2. Earth’s Interior Geologists learned about Earth’s interior:
Directly from rock samples
Info from rocks that come to the surface
Natural
Forces
Drilling

3. Earth’s Interior Indirectly from seismic waves (earthquakes)
Waves from earthquakes will change speed and direction when traveling through different densities

4. Temperature Top 20m are cool Temperature raises as you go deeper
Heat is left over from formation of Earth and radioactive substances
Pressure increases as you go deeper

5. Earth’s Structure Crust – outermost layer
Solid rock that includes dry land and ocean floor
Between 5 and 40 km thick (mountains 70km)
Oceanic crust is mostly rocks like basalt (dark, fine texture)
Continental crust is mostly
rocks like granite
(light, coarse texture)

6. Earth’s Structure Mantle – thickest layer 3000km thick
Very hot solid rock
Divided up by physical characteristics
Lithosphere – upper part of mantle (1000km)
Asthenosphere – less rigid (plastic like)
Lower mantle – solid material that extends to core

7. Earth’s Structure Core – Earth’s center Made mostly of Fe and Ni
Liquid outer core and solid inner core
Scientists think that movement of the liquid core creates a
magnetic field

8. Brain pop