Tectonic plates
What happens at a convergent boundary?
Plates collide
What is the ring of fire?
A shaped like horseshoe in the pacific ocean where most of the world active volcanoes are at
What are the three main waves and what are they in order?
Primary waves,secondary waves,and surface waves
What is the primary cost of most tsunamis?
Underwater Earthquakes
What is the lithosphere?
The solid, rigid outer layer composed of the crust and the uppermost part of the mantle, which is broken into tectonic plates
What occurs at a divergent boundary
Plates pull apart/magma rises
What is a shield volcano?
Wide gentle slopes,formed by runny lava
What instrument is used to record ground movements?
A semismograph or semismeter
How fast can a tsunamim travel in the deep ocean?
500-to 600 mph as fast as a jet plane
What Is the Asthenosphere?
The plastic-like layer in the upper mantle below the lithosphere, allowing plates to "float" and move.
What is a transform boundary?
The plates slide past eachother
What is a Composite volcano?
steep sided tall cones built by alternating layers of lava with pyroclastic material
What is a earthquake and why do they happen?
There are vibrations of Earth's crust caused by the sudden movements of rock along faults
What is a wave train?
A series of waves not just one
What are convent currents?
Located in the mantle, these are caused by heat from the core, driving the motion of the plates.
What causes the plates to move?
Convection currents in the mantle
What is a Cinder cone volcano?
Steep small and narrow formed by exploding lava fragments
How do tectonic plates cause earthquakes?
Plates scrape and push against each other, building up energy that is released
What is the ring of fire for tsunami
with many earthquakes and volcanoes making it a high risk area for tsunami
What are the different crust types?
Oceanic:is thinner and denser and crust is found under the ocean Continental:Thicker,less dense crust
What are tectonic plates?
Tectonic plates are solid rock that makes up the Earth's outer shell or the lithosphere
What is a hot spot?
A area where magma rises mostly far from plate bounderies
What is a fault?
A break or a crack in the Earth's crust
What is a main natural warning of a tsunami?
The ocean pulling back from the sea floor exposing the sea floor
What is divergent boundaries?
Plates move apart, forming new crust