Earthquakes & Volcanoes

Which most likely causes earthquakes?

• plates slipping

• a hurricane

• water weathering rocks

• tidal stresses caused by the moon

Some volcanoes in the Ring of Fire were formed near

• hot spots.
• subduction zones.
• divergent boundaries.
• normal faults.

Where do isolated, volcanic islands, such as Hawaii form?

• transform boundaries
• divergent boundaries
• subduction zones
• hot spots

A _____________ measures the size of an earthquake.

• barometer
• Doppler radar
• depth scale
• seismograph

Mount St. Helens formed at 

• converging boundaries.
• diverging boundaries.
• transform faults.
• rift zones.

How could an older rock layer be on top of a younger rock layer?

• Earthquake activity folded the rock layers.
• Volcanic eruptions destroyed a rock layer.
• Erosion removed several layers of rock.
• Weathering changed the layering of the rocks.

Earthquakes occur in the _____________.

• crust

• mantle

• inner core

• outer core

What landforms are created at reverse faults?

• deltas
• mountains
• dunes
• islands

What is mostly likely the cause of an earthquake?

• stress due to movement in Earth's crust
• gravitational variation due to Moon's orbit around Earth
• temperature variation due to Earth's orbit around the Sun
• rotational imbalance due to changes in Earth's poles

What process would cause younger rock layers to be under older rock layers?

• melting and hardening
• cooling and heating
• deposition and cementing
• uplifting and faulting