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Why does the ocean crust go underneath the continental crust
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
Compared to Oceanic crust, Continental crust is
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
The part of the mantle that moves like putty is the
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
This movement causes magma to rise and sink, moving the tectonic plates around the Earth
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
How do S waves help us understand that the Earths outer core is liquid?
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
What is a tectonic plate
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
Where is the Asthenosphere located
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
The main evidence we use to tell us about the layers of the Earth comes from...
The middle mantle
Seismic waves and Volcanoes
Ocean crust is made of basalt which is more dense than continental crust
S waves can not travel through liquid and are not felt on the oppsite side of the earth
Thicker and less dense
A slab of crust and upper mantle that drifts over Earth's surface
Asthenosphere
Convection currents
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