The Structure of Earth
How many layers does Earth have? (Just the number of layers)
Four
What causes damage to the Earth's surface?
Earthquakes or tectonic plates movement
The lithosphere is composed by?
The crust and the upper mantle
Mount St. Helen is located in
Washington State
Name the layers of Earth from top to bottom
Crust, mantle, outer core, inner core
What is the most dangerous magnitude of an Earthquake?
The value is 9 to 10 on the Richter Scale.
Divergent boundaries are plates moving
Away from each other
Volcanoes produce this type of rock
Igneous
What are the main elements of the inner core?
Iron and nickel
The main point of an Earthquake on the crust is called...
The epicenter
The ring of fire is located on
On the west of the American continent all the way to Asia.
One of the most dangerous type of volcanoes is
The stratovolcano
The outer core is made of...
liquid magma
The waves that cannot travel through liquids are
The S waves
Tsunamis can travel as fast as
An airplane
The three stages of a volcanic eruption are
Inflation
Peak Inflation
Eruption (deflation)
What produces the magnetic field of the Earth?
The core and rotation of the Earth
The minimum number of seismographs to detect the epicenter of an earthquake should be
Three
Is a tsunami only one wave?
No, they can be multiple waves.
A tiltmeter's original position is 150 Km, in 12 days it changed to 187 Km. What is the rate of change per day?
It is around 3 (3.08) Km/day