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Hard
Super Hard
100

What is the top layer of the Earth called?

The Crust  

100

What is the layer of the Earth directly under the Crust called?

The Mantle

100

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 

100

The Richter scale measures the _________ of an Earthquake.

Magnitude

200

What Californian city had a destructive earthquake in 1906? 

San Francisco

200

What is a fault line?

the place where two plates meet.

200

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!

200

What is the name of the large Fault line that runs for 750 miles through California?

San Andreas Fault

300

What is a tsunami?

A large ocean wave usually caused by an underwater earthquake or a volcanic explosion.

300

What is a smaller earthquake that occurs right after a larger earthquake called?

An aftershock

300
What are the two different names of plates? (What is on these plates?)

Oceanic and Continental Plates (oceans and continents). 

300

When one plate slides past another plate it is called a _____     ________   fault.  

Strike Slip

400

What scale measures earthquake's magnitude?

The Richter Scale

400
At what magnitude is an Earthquake felt by most people and causes some damage to buildings?

Magnitude 6

400

How many times greater is each level on the Richter Scale?

10 times greater

400

What is the instrument used to measure earthquakes

A siesmograph

500

Why does an Earthquake happen?

Two plates rub together or slide past each other after a huge amount of pressure has built up.

500

What does the Mercalli Scale measure?

How much destruction and damage an Earthquake makes (to buildings)?

500

What TWO states in the the US get the most earthquakes?

Alaska and California

500

What is Pangea?

The name for when all the continents were stuck together over 200 million years ago.

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