Volcano activity
What substance comes out of a volcano?
Magma
An ____ is the shaking and movement of rock beneath the earths surface.
Earthquake
what are the first 2 layers of the earth called?
Oceanic ridge and Continental crust.
What is below the upper mantel??
Asthenosphere
Law of ______ dates from oldest layer is at the bottom of the sequence and the youngest layer is at the top.
Superposition
What is the main cause for volcanic eruption
Tectonic plates
The point of earths surface that is vertically above earths surface is..
Epicenter
What is the farthest layers from continental crust
Inner core.
What is a fossil???
The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
Inclusions
How many steps does volcanic activity have
4 steps
What are the 3 boundary's types
Convergent
Divergent
Transform
In what layer do you see convection currents.
They are found in the mantel.
According to the theory of tectonic movement , which layer of the earth is broken into separate sections called plates.
Crust
What happens in the law of cross cutting?
The ______which makes the plates converge and magma comes out the volcano.
Sea floor spreading
What is used for the measurement of waves.
Seismic graph
What is the same thing as a underwater mountain
Oceanic ridge
The process by which the ocean floor sinks beneath a less dense plate and goes back into the mantle is known as-
Seduction zone.
what is relative dating?
Relative dating is the process of determining if one rock or geologic event is older or younger than another, without knowing their specific ages
What are the steps in volcanic activity
1. Magma heats up
2. Magma rises and tectonic plates move
3. The sea floor spreads and magma comes out the top
4.The magma cools and sinks to the core then re-heats and repeats
What are the 3 types of earthquakes waves and when do they accrue.
1. Primary/ first
2. secondary/ second
3. Surface/ last
What layer is between inner core and mesosphere
outer core
What are contour lines in topography
a line on a map joining points of equal height above or below sea level.
What is a fualt??/
A fault is a fracture along which movement has occurred.