Volcano and Earthquake Environmental Science

An earthquake is a vibration of Earth caused by a rapid release of energy and occurs at a ____

• fault
• fracture
• anticline
• subduction zone

The point below ground where the earthquake first occurs

• fault
• epicenter
• focus
• shadow zone

Location on the surface directly above the focus where the most damage occurs is called the ___

• focus
• epicenter
• fracture
• subduction zone

What is the name given to the geographic feature in this picture?

• Subduction Zone

• Mid Ocean Ridge

• Ocean Trench

• Sea Floor Spreading

Here is a picture of a seismogram. Which seismic wave reaches the station first?

• P Wave
• S Wave
• H Wave
• L Wave

Scientists locate the epicenter of an earthquake by using the ___ of the P and S waves.

• combination of arrival times
• speed
• direction
• difference in arrival times

Look at the picture. What is the location called where all three circles intersect?

• focus
• earthquake
• epicenter
• seismograph

What geographic feature is shown in this picture?

• Mid Ocean Ridge

• Subduction Zone

• Mountain Range

• Seismograph

The oldest rock on the ocean floor can be found

• In the middle of a mid-ocean range

• Furthest away from the middle ocean ridge

• On the left side of the ridge

• On the right side of the ridge

During an earthquake, loose sediments are saturated with water and become like liquid in a process called ___.

• condensation
• deposition
• sublimation
• liquefaction