Plate Boundaries
What plate boundary cause earthquakes and fault lines?
Transform
What layer is like jelly that the lithosphere floats on?
Asthenosphere
What did the continents fit together like?
A puzzle
If magma has a lot of silica will it be non-explosive or explosive?
Explosive
What plate boundary motion is this? ---> <---
Convergent
What plate boundary causes sea floor spreading?
Divergent
Is continental crust more or less dense than oceanic crust?
More
What was Alfred's theory?
Pangea split
If magma has low silica the viscosity is?
What plate boundary motion is this?
--->
<---
Transform
What plate boundary forms mountains?
Convergent
Does oceanic crust have a lot of silica in it?
No
What question could Alfred Wegener not answer?
How did Pangea split?
What caused Hawaii to form non-explosive volcanoes?
A hotspot under the tectonic plate that never moved but the plate did causing more volcanoes to show up
What plate boundary motion is this <--- --->
Divergent
Is Hawaii on a plate boundary?
No
What does an increase in pressure do deep in the earth?
Keeps rocks solid
How did Alfred Wegener support his theory?
Glacial grooves and tropical fossils along the country
What forms an explosive volcano?
A continental convergent and an oceanic convergent tectonic plate
What is sea floor spreading?
Plates pulling away letting magma escape, magma cools and chisels old crust
What is the area called that oceanic crust sinks under continental crust?
Subduction zone
Which layer is a primary wave unable to go through?
None
What did scientists find out after Alfred died actually caused Pangea to split?
Sea floor spreading
What are the types of lava flows a non-explosive volcano contains?
Blocky lava, Pahoehoe, 'A'A and Pillow lava
What layer is a tectonic plate made of and what does it float on?
Lithosphere, it floats on the jelly-like asthenosphere