Relative Dating
What is cross cutting?
any feature that cuts across a body of sediment or rock younger than the body of sediment or rock that it cuts across.
What are the three main layers of the earth?
core(outer inner),upper mantle, and crust
What is an earthquake?
The shaking and trembling that results from the movement of rock beneath Earth's surface.
what do you use to find elevation of things?
Topography
What are the three types of plate boundaries?
Divergent, convergent, and transform boundaries
What is superposition?
In any undisturbed sequence of strata, the oldest layer is at the bottom of the sequence, and the youngest layer at the top of the sequence.
Ranges from non explosive lava emissions to extremely violent explosive bursts that may last many hours
volcanic activity
What are P and S waves?
P waves are primary waves. S waves are secondary waves.
The vertical distance or difference in elevation between contour lines
Contour Interval
the shift of the plates that make up the earths crust
tectonic movement
the history of the earth as a record in rocks that make up its crust
geologic record
what can you find in the layers of the earth?
Fossils
the point on the surface directly above the focus is called the...?
Epicenter
what do you use to measure topography maps?
Contour Line
They are found in every ocean basin and appear to trifle earth they are formed by plate tectonics
oceanic ridge
the process of determining the age on a specified chronology in geography
absolute dating
the process of what continually adds new crust to the ocean floor along both sides of the mid-ocean ridge?
sea-floor spreading
What are the three types of seismic waves
primary waves, secondary waves, surface waves
a columnar diagram that shows the rock formations of a locality or region and that is arranged to indicate their relations to the subdivisions of geologic time
geologic column
A method for determining the age of an object contains organic material by using the properties or radiocarbon
Carbon dating
the process of determining if one rock or geologic event is older or younger than another, without knowing their specific ages
relative dating
The upper layer of the earths mantle below the lithosphere
Asthenosphere
A current of fluid that results from convection
Convection currents
what is a trench?
a long, narrow ditch.
The prices of the earths crust and uppermost mantle, together referred to as the lithosphere
Tectonic plates