Vocabulary
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary
Composition of oceanic plates. More dense rock than continental ones.
What is Basalt
The thickest layer of the Earth
What is the mantle.
Hot magma is less ________________ than cool magma
What is dense
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
Plates float on top of the _______________________.
What is the asthenosphere
This is the mechanism (what causes) the plates to move
What is convection currents in the mantle
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
States that youngest rocks of ocean floor are at divergent boundaries, moving outward
What is seafloor spreading
The liquid layer of Earth.
Outer core
Pangaea existed this many millions of years ago
What is around 250 million years ago
3 landforms that occur at convergent plate boundaries
Mountains, Volcanoes, Deep Sea Trench
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
When one plate is forced under another, this type of energy moves the plates. It accounts for 90+% of the energy in plate tectonics.
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
What is thinnest under the ocean and thickest under the continents.
Two landforms that form at divergent boundaries
What are Mid ocean ridges and rift valleys
This invention allowed for the discovery of mid-ocean ridges and supported the concept of Plate Tectonics.
What is Sonar?