REVIEW--Earthquakes and Volcanoes

An instrument that detects and records earthquakes.

• seismic wave

• seismometer

• seismograph

A vibration caused by an earthquake.

• seismic wave

• seismometer

• seismograph

What is the main cause of most earthquakes?

• human activity

• hurricanes

• changes in temperature in Earth's mantle

• pressure deep within the Earth, from the movement of tectonic plates.

What is the major volcanic belt that circles the Pacific Ocean?

• ring of fire

• ring of rock

• ring of water

• ring of plates

What is a Hot Spot?

• An area where to plates move apart and magma comes to the surface.

• An area where two plates rub together and the friction creates magma.

• An area where magma from deep within the mantle melts through the crust above it.

• An area where one plate subducts and melts and the magma rises to create a volcano.

At which boundaries do volcanoes form?

• divergent and transform

• convergent and transform

• convergent and divergent

• volcanoes do not form along plate boundaries

A broad volcano with gently sloping sides is a ________________

• Shield

• Cinder Cone

• Fire Fountain

• Composite

A small volcano with steep sides.

• cinder cone

• composite

• strata

• shield

A steep-sided volcano formed from layers of lava and ash.

• Strata or composite

• shield

• cinder cone

• fire fountain

Lava that is very thin and runny probably

• has low silica content

• is high in silica