variables
This variable goes on the x-axis
What is the independent variable
The two ways to express the age of a rock
What is relative age and absolute age
lava that hardens on the surface of a sedimentary rock layer
What is an extrusion
this is a break in the Earth's crust
What is a fault
The Grand Canyon was formed from this
What is the processes that that wear away the surface of the Earth (erosion and deposition)
This variable goes on the y-axis
What is the dependent variable
The age of a rock compared to the ages of other rocks
What is relative age
lava that breaks through layers of rock beneath the surface of the Earth
What is an intrusion
These processes will make it difficult to determine the relative ages of rocks
A volcano has just erupted and lava has spilled over the surface of the Earth. This new layer of rock is called what?
What is an extrusion
What is the control variable
The number of years that have passed since the rock formed
What is absolute age
This law states that in undisturbed horizontal rock layers, the oldest layer is at the bottom and the youngest layer is at the top
what is the law of superposition
This process is when the the surface of the Earth is moved by wind, water, ice, or gravity
What is erosion
This rock type is formed from hardened lava or magma
What is an igneous rock
This variable is measured
What is the dependent variable
The method to determine the relative age of a rock
What is using the law of superposition
An intrusion is always younger than this
The rock layers around and beneath it
This process occurs when particles from the Earth are built up in a certain location
What is deposition
This rock type is formed from the accumulation and deposition of small particles
What is a sedimentary rock
This variable can be changed by the experimenter
What is the independent variable
The method to determine the absolute age of a rock
What is radioactive dating
an extrusion is always younger than this
the rock layers beneath it
A gap in the geologic record
What is an unconformity
This rock type is formed from the transformation of existing rock types because of heat or pressure
What is a metamorphic rock