Earth's Layers
What are the layers of the Earth?
Crust, Upper Mantle, Lower Mantle, Outer Core, Inner Core
What is the scientific theory that explains how major landforms are created?
Plate Tectonics
Who proposed the idea of continental drift?
Alfred Wegener
What are the three kinds of plate boundaries?
Convergent, Divergent, and Transform
What are the two types of crust?
Oceanic and Continental
Who proposed that the ridges under the sea were the result of molten rock rising from the upper mantle?
Harry Hess
When talking about Pangaea, the pieces seemed to fit together like pieces of a what?
Jigsaw Puzzle
What kind of boundary occurs when two plates slide past each other horizontally?
Transform Boundary
Which layer is made up of partially melted rock?
What is the zone called where crust cycles back into the earth?
What is it called where a continental landmass is ripping itself apart?
Rift Valley
What kind of boundary has two continental plates come together and collide, pushing the crust upwards to form a mountain range?
Convergent Boundary
Which layer is made up of liquid iron and nickel?
Outer Core
What causes the plates to move relative to each other at different rates?
Convection
What were the three things that were responsible for "continental drift"?
Seafloor spreading, rift valley formation, and subduction.
What boundary is found where two tectonic plates move away from each other?
Divergent Boundary
Which layer is responsible for the Earth's magnetic field, which helps protect the planet from solar winds and cosmic radiation?
The Core
Who proposed the idea of hot spots in the mantle?
What process causes molten rock to rise from the Earth and add new crust to the edges of the old crust?
Seafloor Spreading
Which tectonic plate has 3 kinds of boundaries found at it?
The Pacific Plate