Easy
What is the top layer of the Earth called?
The Crust
What is the layer of the Earth directly under the Crust called?
The Mantle
What is the area with the world's highest amount of volcanoes, as well as 90 percent of the planet's earthquakes. It makes a certain shape on the map and is where several oceanic and continental plates come together.
The Ring of Fire
The Richter scale measures the _________ of an Earthquake.
Magnitude
What Californian city had a destructive earthquake in 1906?
San Francisco
What is a fault line?
the place where two plates meet.
What is Shake Alert?
ShakeAlert is an earthquake early warning system that detects significant earthquakes so quickly that alerts can reach many people before shaking occurs. You get alerts on your phone!
What is the name of the large Fault line that runs for 750 miles through California?
San Andreas Fault
What is a tsunami?
A large ocean wave usually caused by an underwater earthquake or a volcanic explosion.
What is a smaller earthquake that occurs right after a larger earthquake called?
An aftershock
Oceanic and Continental Plates (oceans and continents).
When one plate slides past another plate it is called a _____ ________ fault.
Strike Slip
What scale measures earthquake's magnitude?
The Richter Scale
Magnitude 6
How many times greater is each level on the Richter Scale?
10 times greater
What is the instrument used to measure earthquakes
A siesmograph
Why does an Earthquake happen?
Two plates rub together or slide past each other after a huge amount of pressure has built up.
What does the Mercalli Scale measure?
How much destruction and damage an Earthquake makes (to buildings)?
What TWO states in the the US get the most earthquakes?
Alaska and California
What is Pangea?
The name for when all the continents were stuck together over 200 million years ago.