earthquake

How many earthquakes are officially reported each year in the United States according to the Geological Survey?

• About 20

• Several million

• Exactly 100

• Over 450

What are the four major layers of the Earth?

• Inner core, outer core, mantle, crust

• Outer core, inner core, crust, mantle

• Mantle, crust, inner core, outer core

• Crust, mantle, outer core, inner core

What causes an earthquake?

• The shifting and sliding of tectonic plates

• Volcanic eruptions

• A sudden change in the weather

• The rotation of the Earth around the sun

What is the Ring of Fire known for?

• A famous movie title

• Being a popular hiking destination

• Having over 450 active volcanoes and being the start of nearly 90% of all earthquakes

• Being the deepest part of the ocean

What device is used to measure the intensity of an earthquake?

• Barometer

• Thermometer

• Seismograph

• Compass