Earthquake

What's the main cause of most earthquakes?

• Pressure from within Earth's crust

• Hurricanes

• Human activity

• Changes in temperature within the earth's mantle

How do rock particles move during the passage of a Primary wave (P-waves) through the rock?

• the particles do not move

• in a rolling circular motion

• back and forth parallel to the direction of wave travel

• back and forth perpendicular to the direction of wave travel

What causes the up-and-down wiggles on the seismogram shown above?

• tsunami waves

• ground vibrations

• electromagnetic pulses

• variations in air pressure

Which of the following statements BEST describes secondary waves (S-waves)?

• circular motions like an ocean wave

• snake-like motions parallel to the Earth's surface

• contractions and expansions that are in the direction of wave propagation

• shearing motions that are at right angles to the direction of wave propagation

Which layer of the Earth does S-waves do not travel?

• core

• crust

• mantle

• moho

Which of the following earthquake waves can travel through both solids and fluids?

• P waves only

• S waves only

• Q-waves only

• Both P and S waves

Which seismic waves travel through the interior layer of the Earth?

• body waves

• deep waves

• inner waves

• surface waves

What do you call the motion or vibration of earthquake that travels outward from the focus?

• chemical energy

• electromagnetic waves

• gravity waves

• seismic waves

What is the most destructive earthquake wave?

• S waves

• P waves

• Q waves

• Surface waves

It measures the energy released at the source of the earthquake.

• Intensity

• Magnitude

• Velocity

• Seismic Waves