Earth science revision

_________________ has the most active volcanoes in the world. It is located along the __________________________.

Second waves to arrive that cause earthquakes

• P waves
• S waves
• Surface waves

The epicenter of an earthquake is

• The point below the surface where rock begins to break and the first motion occurs
• The seismic station closest to the earthquake
• The place where the greatest damage occurs
• The point on the surface directly above the focus

What causes a tsunami?

• shaking of the water during an earthquake or volcano

• Seismic energy released by tectonic plates

• a really big boat

What is this scale?

• Modern Magnitude Scale
• Mercalli Scale
• Richter Scale
• None of the above.

Which can result from the earthquakes and volcanic eruptions?

• glaciation
• erosion
• precipitation
• formation of mountains

Volcanoes can be found...

• on land
• under water
• on islands
• all of the above

What is the minimum number of seismograph stations needed to locate an earthquake epicenter?

• 1

• 2

• 3

• 5

The Richter scale measures:

• the amount of radon gas released
• the movement of plates
• the strength of an earthquake
• the weight of tectonic plates

What can cause a tsunami?

• earthquake
• underwater volcanoes
• landslides
• all of these