original horizontality
superposition
cross-cutting relationships
Responses
original horizontality
original horizontality
angular relationships
angular relationships
radiometric dating
radiometric dating
superposition
superposition
original angularity
original angularity
cross-cutting relationships
superposition
cross-cutting relationships
Responses
by their chemical compositions
by their chemical compositions
by their physical properties
by their physical properties
by their thickness
by their thickness
by their temperatures
by their temperatures
by their amounts of land area
by their physical properties
Responses
It is horizontally-oriented.
It is horizontally-oriented.
Other layers have been deposited above it.
Other layers have been deposited above it.
It has been crumpled and folded, while the other layers lie flat.
It has been crumpled and folded, while the other layers lie flat.
It cuts through all the other layers.
Responses
Once-living organisms become buried.
Once-living organisms become buried.
Layers build up over time.
Layers build up over time.
Pressure causes rock to change.
Pressure causes rock to change.
Magma cools and hardens.
Responses
compaction followed by cementation
compaction followed by cementation
heating followed by pressure
heating followed by pressure
melting followed by cooling
melting followed by cooling
weathering followed by erosion
Responses
Seismic waves travelled at constant speeds.
Seismic waves travelled at constant speeds.
Seismic waves penetrated all Earth's layers.
Seismic waves penetrated all Earth's layers.
Seismic waves travelled at varying speeds.
Seismic waves travelled at varying speeds.
Seismic waves could not go through the brittle crust.
Responses
lithosphere
lithosphere
inner core
inner core
asthenosphere
asthenosphere
outer core