Show:
Plate Tectonics
Earthquakes
Volcanoes
Extras
100
What do the plate tectonics move on?
The lithosphere
100
What is and Earthquake?
Trembling of earth's crust.
100
what are the three types of volcanoes?
1. Shield 2. Composite 3. Cinder cone
100
Who came up with the theory of plate tectonics?
Alfren Wengener
200
List and explain the three different types of plate boundaries.
1. Convergent: When the plates move in the same direction and come together. 2. Divergent: When the plates move away from each other. 3. Transform: When the plates are going the opposite direction.
200
What wave is the most destructive?
The L wave or the Surface wave
200
How can you tell when a volcano will erupt?
When there is gas coming out of it and how by the earthquake activity.
200
What is the difference between magma and lava
Magma is inside the volcano and lava is outside the volcano
300
How much does the United states move a year.
2 inches a year.
300
When do the plates move and why?
Plates move and stress is released.
300
What are benefits of volcanoes
Makes fertile soil and the ash releases potassium and phosphorous.
300
When did Mount St.helens erupt?
July 10 2008
400
What is the results of the three plate boundaries moving?
1. Convergent: Causes underwater trenches, volcanoes, mountains, tsunamis, and earthquakes. 2. Divergent: Causes rift valleys, mid- atlantic ridges, volcanoes, and earthquakes. 3. Transform: Just causes earthquakes
400
How do earthquakes start?
Energy that travel as waves.
400
What are the factors for how explosive the volcano will be?
Gas and silica/viscosity
400
What was the most recent volcanic eruption?
Mexico on April 24th
500
What is the difference between the focus and the epicenter?
The epicenter is on the surface and where surface waves come from. The focus is the under ground waves and where primary and secondary waves come from.
500
How does the ring of fire create earthquakes and volcanoes?
When the plates get enough stress it creates an earthquake or volcano and sometimes both.
500
What is the largest volcanic eruption in earths history?
Mount St. Helens