Earth's Layers
Which of Earth's Layers is broken up into plates.
Crust
What happens to a material's density when your heat it.
Particles move more and expand. Becoming less dense.
Who first proposed the theory of Continental Drift
Alfred Wegener
What are the three types of plate boundaries
transform, divergent, convergent
Are faults older or younger than what they cut into
Younger
What type of Crust is found underneath a Continent
Continental Crust
What happens to warm, less dense fluids.
They rise
Sea floor spreading occurs at what boundary
Divergent Boundary
How do plates move at a convergent boundary
Towards (Collision)
Are intrusions older or younger than the Rock they cut into
younger.
Mantle
What happens to cold, less dense material
They sink
What type of Boundary creates a mid ocean ridge
divergent Boundary
How do plates move at a divergent boundary
Away from one another.
What is the law of cross cutting relationships
Intrusions and faults are younger than what they cut into
This solid layer is made mostly of Iron and Nickle
Inner Core
What is a convection current.
A continuous circular motion caused by warm material rising and cold material sinking
Rocks further from a mid ocean ridge are older or younger than at the ridge.
Older
How do plates move at a transform boundary
Slide past one another. Parallel movement.
What is the law of superposition
older sediment layers are found at the bottom. Younger on top
List all Earth's Layers outermost to inner
Crust, Mantle, Outer Core, Inner Core
Explain how temperature difference cause Convection currents.
Heating makes material less dense so it rises. As it rises, the material cools and becomes more dense. So it falls.
Rocks on the sea floor show a pattern of reversal in what?
Earth's Magnetic Field
What geological event occurs at transform
earthquakes
What fraction of parent isotopes remain after two half-lives
1/4