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Earth Layers Notes
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Seismic Layers
o Scientists know that the Earth ______________________________________
 This is known by ____________________________________________
 If the Earth was not layered, seismic waves would travel ______________
_________________________________________________________
 This is ________ the case
Earth Layers
o Four Major Layers
 1. Crust – the ______________________________________________
 Two types - ___________________________________________
o Continental - ________________________________________
o Oceanic - __________________________________________
 2. Mantle
o Upper mantle is _______________________________________
(______________________________________________)
o Lower mantle is________________________________________
o Magma rises and lowers, creating___________________________
 3. Outer Core
o ________________________________________
 Flowing iron produces Earth’s _________________________
 4. Inner Core –
o Hottest Layer
 Solid iron-nickel sphere
 Solid due to ____________________________________
Lithosphere & Asthenosphere
o Lithosphere
 Cool solid outer layer of Earth
 Consists of ___________________________________________
o Asthenosphere
 Warm soft and weak layer of Earth
 Consists of ___________________________________________
Moho
o Mohorovicic Discontinuity
 The separation between the ____________and the _________________
 Shortened to Moho
 Discovered in _____________by seismologist Andrija Mohorovicic
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Discovered it by studying ____________________________________
Earth Layers Notes




Seismic Layers
o Scientists know that the Earth ______________________________________
 This is known by ____________________________________________
 If the Earth was not layered, seismic waves would travel ______________
_________________________________________________________
 This is ________ the case
Earth Layers
o Four Major Layers
 1. Crust – the ______________________________________________
 Two types - ___________________________________________
o Continental - ________________________________________
o Oceanic - __________________________________________
 2. Mantle
o Upper mantle is _______________________________________
(______________________________________________)
o Lower mantle is________________________________________
o Magma rises and lowers, creating___________________________
 3. Outer Core
o ________________________________________
 Flowing iron produces Earth’s _________________________
 4. Inner Core –
o Hottest Layer
 Solid iron-nickel sphere
 Solid due to ____________________________________
Lithosphere & Asthenosphere
o Lithosphere
 Cool solid outer layer of Earth
 Consists of ___________________________________________
o Asthenosphere
 Warm soft and weak layer of Earth
 Consists of ___________________________________________
Moho
o Mohorovicic Discontinuity
 The separation between the ____________and the _________________
 Shortened to Moho
 Discovered in _____________by seismologist Andrija Mohorovicic

Discovered it by studying ____________________________________