Layers of Earth
Which layer of the earth is all liquid
Outer Core
When all the continents were connected it former a super continent called:
Pangea
The type of plate boundary is responsible for seafloor spreading
Divergent
When two continental plates collide what is formed?
mountains
What are the three forces that help move the plates?
Basal drag, slab pull, ridge push
This is the thinnest layer of earth
Crust
What scientist came up with the theory of continental drift?
Alfred Wegener
This type of plate boundary is responsible for creating large mountain ranges.
convergent
This geological feature is created at a divergent boundary in the middle of the ocean
mid ocean ridge
The ocean floor permanently records the direction of Earth's magnetic field. What type of rock is recording the magnetic field?
Basalt
This is the thickest layer
Mantle
What were three pieces of evidence that support the continental drift theory?
Rocks, fossils, glaciers, climate data, and the continents fit together like a puzzle
This type of boundary is located where two plates are grinding past each other.
Transform
What is formed on the edge of continents when an oceanic plate goes under a continental plate
Volcanoes
This force is the force of gravity acting on the mid ocean ridges pushing them down and outward.
Ridge push
This layer is made of solid iron and nickel
Inner Core
What is the mechanism that is driving continental drift
The area where a plate gets pulled underneath another plate is called
subduction zone
What is formed near the plate boundary in the ocean when an oceanic plate goes under a continental plate
Trench
The force from the piece of the oceanic crust being subducted the helps pull the rest of the crust towards it is called:
Slab Pull
Which type of crust is less dense
Continental crust
Why was the original continental drift theory rejected by scienctists? 2 reasons
He could not measure that the continents were moving and he did know how they were moving
What type of boundary is located in California and is responsible for their frequent earth quakes?
Transform
When two oceanic plates collide and one is older and more dense goes underneath the other one what two features will be formed?
Trench and volcanic island arc
How does the polarity of the ocean floor prove seafloor spreading is occurring?
The polarity of the rock on both sides of the ridge are symmetrical