Transcript CHAPTER 9

CHAPTER 9
HOW DO WE KNOW ABOUT
THE CORE OF THE EARTH?
MUST BE DONE FROM
OUTSIDE
• EXAMINE ROCK
• MONITOR EVENTS
• EXAMINE
FORMATIONS
EARTHQUAKE
• MOVEMENT OF THE EARTHS CRUST
SEISMOGRAPH
• MACHINE USED TO MEASURE
STRENGTH OF AN EARTHQUAKE OR
TREMOR
Seismogram
• Measure the lines
P waves
• Move through all
S waves
• Surface waves
• Move only through solid
crust
• Solid outer part of earth
mantle
• Largest – thickest
• Molten Layer of earth
Outer core
• Liquid layer of core
Inner core
• Solid layer of core
• Why solid?????
moho
• Between mantle and crust
• Has plasticity- solid acting like a liquid
• Plates move on it