Show:
plate tectonic
volcanoes
earthquakes
earth
100
what is it called when platrs collade
convergent boundaries
100
what is fresh volcanic ash made of
pulverized rock
100
How do earthquakes occur
When the crust breaks
100
what is the thinnest layer of the earth
the crust
200
what is it called when plates separate
divergent boundaries
200
what can and erupting volcano trigger
tsunami,flash floods,and earth quakes
200
What is the most earthquake-prone state
Alaska
200
Solid near the crust
Mantle
300
what is it called when plates slide pass each other
transform boundaries
300
Name two states that have the most active volcanoes
Hawaii,Alaska,Oregon,California
300
What did the undersea earthquake in the Indian Ocean trigger
Tsunami
300
Most dense layer
Core
400
What did Alfred Wegener find
Pangaea
400
A volcano is a mountain that opens uo to what
Molten rock
400
How many earthquakes are there in southern California
10,000
400
The uppermost part of the mantle is what
Solid
500
How far do the plates move a year
About 2 centimeters
500
Were is the ring of fire located
Pacific Ocean
500
Almost 80 percent of all planets earthquakes occur where
The rim of the pacific Ocean
500
There are parts of layers what are they
Inner and Outer core