Earth's Layers
The part of the earth we all live on.
What is the crust?
This is what an earthquake is.
What is shaking of the earth's crust?
This increases as amplitude decreases
what is frequency?
This plate boundary moves toward other plate boundaries.
What are convergent boundaries?
The theory that Alfred Wegener proposed.
What is Continental Drift?
Largest layer of the earth.
What is the mantle?
This is where an earthquake starts.
What is the Focus?
This kind of wave is released when the coils expand, compress and expand again.
what is a compression wave?
These plates are less dense than the oceanic plates.
What are continental plates?
Reasons other geologists didn't believe the theory at the time.
what is lacking evidence?
This part of the core is solid.
What is the inner core?
This wave travels through the earth.
What is a body wave?
This wave is faster than an S wave.
What is a P wave?
These types of convergent boundaries create volcanoes, subduction zones, and sea trenches.
What is continent to continent?
The length that the continents move each year.
what is 2.5 Cm?
This is how long the layers have kept the core hot.
what are 4.5 billion years?
This wave does more damage than the other wave.
what is a surface wave?
S waves are these kinds of waves.
What are amplitude and frequency waves?
Continent to Continent divergent boundaries makes this geological form.
What are mountains?
This is the cause of Continental drift.
What is sea-floor spreading?
The core is made up of these elements.
What are iron and nickel?
Most shakings felt from an earthquake is from these waves.
What is a Rayleigh wave?
P waves travel through this rock faster.
What are sedimentary rocks?
Oceanic plates are made of this rock.
What is Basalt?
The year Alfred Wegener proposed his theory.
What is 1912?