Show:
Continental Drift
Lava
Volcanoes
Boundaries
Boundaries Cont'd
100
Who proposed continental drift?
Alfred Wegner
100
If lava is thick and trap more gas, does it have low or high viscosity
High
100
What is the largest volcano? Why?
Shield volcano because the lava flows farther.
100
What type of boundary is the San Andreas Fault?
Transform
100
What features are created at an oceanic-oceanic boundary?
Mid-ocean ridge
200
Describe two things that support continental drift
Fossil Records, Continents fit together like puzzles, landforms like mountain chains
200
What makes lava more viscous?
Silica
200
What two things cause a volcanic eruption to be explosive?
Viscosity and Trapped Gas
200
What type of boundary has plates that move together?
Convergent
200
What is created at an oceanic-continental boundary?
Volcanoes
300
What are the two types of plates?
Continental and Oceanic
300
what is the smallest pyroclastic material called?
Ash
300
What is the volcano that exists at Yellowstone Park?
Caldera
300
What type of boundary has two plates moving apart?
Divergent
300
What is created at a continental-continental boundary?
Mountain chains
400
Is the Atlantic Ocean getting bigger or smaller? Why?
Bigger, because of seafloor spreading
400
What is the largest pyroclastic material called?
Blocks/Bombs
400
What is the process called when one plate dives beneath another?
subduction
400
What did the Hawaiian Islands form over?
Hot spot
500
Temperature of rocks, age of rocks, and magnetic reversals are evidence of .......
Seafloor spreading
500
What type of lava forms a shield cone?
Fluid, not viscous
500
What happens to the plate that dives beneath another plate?
It becomes recycled in the convection currents.