Earth's Layers
How many layers does Earth have?
4 layers
What creates a seismic wave?
Earthquakes
How many types of plate boundaries are there?
There are 3.
Massive underwater earthquake cause what?
Tsunamis
What did Alfred Wegener propose in 1912?
The Theory of Continental Drift
What is the top layer of Earth called?
The crust
What is the motion of an S-wave?
Side to Side
Divergent Boundaries
Earthquakes, the shaking of Earth’s crust, is caused by what?
The release of energy.
How was Wegener treated by other scientists about his claims?
Other scientists criticized him and didn't believe him
Is the outer core or inner core liquid?
The outer core
What is the fastest surface waves?
Love-Waves
How do Transform Boundaries cause plates to move?
Past each other
The point where an earthquake starts underground is called what?
The focus
What was the problem with Wegener's proposal?
Wegener had no explanation for how continental drift happened.
Is the mantle solid, liquid, or both?
Both
Most of the shaking from an Earthquake is due to what wave?
Rayleigh Waves
What matters in Convergent Boundaries?
Density
What is a fault?
A break in Earth’s crust along which movement has occurred
What did Wegener theorize caused continental drift?
Earth's rotational force
What are the 2 main elements in the inner core?
Iron and Nickel
How fast do P-waves travel?
2.5 - 5 miles per second
What are the 3 types of convergent boundaries?
Continent to Ocean, Ocean to Ocean, and Continent to Continent
Major earthquakes happen due to what?
Strain of plate boundary interactions
What were the three pieces of evidence Wegener had?
Rock types, geological structures, and plant and animal fossils found on both sides of the Atlantic.