earthquakes
What is an earthquake?
A movement in the earth.
What is a volcano?
Anything that shoots out lava, water, ash, or steam.
What is a tectonic plate
a "plate" that is the outer layer of earth
What is seafloor spreading
WHere new seafloor is formed
What are earth's main layers
The crust, mantle, core
Where do earthquakes occur?
Usually at plate boundaries
Where are most volcanoes?
the ring of fire
Where are tectonic plates
tectonic plates float on top of the lithosphere
Where is the rock the oldest
It is oldest at a subduction zone.
What are the earth's physical layers
The lithosphere
what is the center of an earthquake?
the epicenter
Where do volcanoes occur?
at plate boundaries
Where are tectonic plates
THere are oceanic and continetial
Where is the rock youngest?
at a mid-ocean ridge.
What are the earyhs chemical layers?
The core, asthenoshpere, mantle, and crust
WHat is above the epicenter?
The focus
How do volcanoes erupt?
Through their vents
What do they cause
tectonic plates cause mountains, ridges, volcanoes, and earthquakes.
Which rock is older: continental or oceanic
continental as it never goes away
Why are volcanoes important?
They let us look at earth's layers