Understanding Earthquakes

What natural phenomenon is compared to a buzzing cell phone in the video?

• Volcanic eruption

• Earthquake

• Hurricane

• Tornado

What are the large pieces of Earth's crust that move and sometimes cause earthquakes?

• Volcanic arcs

• Continental shelves

• Tectonic plates

• Oceanic ridges

Which layer of the Earth is described as being similar to the skin of a peach?

• Outer core

• Crust

• Mantle

• Inner core

What scale was developed first to measure the size of an earthquake?

• Magnitude scale

• Seismic scale

• Richter scale

• Moment magnitude scale

What tool do scientists use to record the vibrations of the ground during an earthquake?

• Anemometer

• Barometer

• Seismograph

• Thermometer

Which earthquake had a magnitude of about 7.9 and caused significant destruction in San Francisco?

• 2004 Indian Ocean earthquake

• 1906 San Francisco earthquake

• 1989 Loma Prieta earthquake

• 2011 Japan earthquake

What engineering solution helps buildings sway gently during an earthquake?

• Shock absorbers

• Wooden frames

• Concrete reinforcements

• Steel beams

What should you do if you are indoors during an earthquake?

• Run outside immediately

• Hide in a closet

• Stand near a window

• Drop, cover, and hold on

What is a recommended item to include in an emergency kit for earthquakes?

• A book

• A map

• A pillow

• A flashlight

After an earthquake, what is a safe action to take?

• Ignore official instructions

• Return to your home immediately

• Drive around to assess damage

• Check for injuries and move carefully