Earth's Layers
What is the thinnest layer of earth.
The Crust
What is Convection Currents.
A current in a fluid that results from convection.
What occurs because of plate tectonics
Intense heat in the Earth's core that causes molten rock in the mantle layer to move.
What is Divergent boundaries
Where new crust is generated as the plates move apart from each other
Earthquakes and Volcanoes are usually located in relation to these
Plate Boundary
What are Tectonic Plates made up of
The Earth's crust and Mantle
What occurs because of convection currents.
The mantle increases in size
A number of rigid, but moving, pieces of Earth's surface
Tectonic Plates
What is Transform Boundaries
Is a Tectonic Boundary, where two plates slide past each other.
What is Plate Tectonics
A theory explaining the structure of the earth's crust
What layer of Earth contains the Tectonic Plates that cause earthquakes and volcano eruptions
The lithosphere
Describe what convection is.
The transfer of heat through the movement of heated fluids or gases.
States that youngest rocks of ocean floor are at divergin boundaries, moving outward
Seafloor spreading
What is Convergent Boundaries
Where crust is destroyed as one plate dives under another.
This is the one under the most pressure
The crust
Where does convection currents take place.
Convection takes place through advection, diffusion or both.
The theory that all continents are fragments of Pangaea now drifting apart
The theory that all continents are fragments of Pangaea now drifting apart.
What is Plate-boundary zones
Zones of interaction between adjacent plates where they collide, pull apart or slide past each other.
What cause the plate to move
Convection cycles in the mantle
Made of liquid, nickle, and iron
Outer core
A major mode of heat transfer.
Convection heat transfer
What is the Mantle
A layer inside a planetary body bounded below by a core and above by a crust
What is Mid-Atlantic Ridge
mid-ocean ridge, a divergent tectonic plate or constructive plate boundary located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world.
Name two the major plates
African plate, and North American plate