Volcanoes Year 12

What is the process by which ocean plates split apart and new crust is formed?

• Divergent boundary

• Convergent boundary

• Plate tectonics

• Sea floor spread

What is the process- material built up at ocean ridges is pushed downwards under gravity?

• Ridge push

• Slab pull

• Convection currents

What is the process- at convergent place boundaries the oceanic plate is subducted and the plate is pulled down

• Ridge push

• Slab pull

• Convection currents

Convergent plate boundaries...

• Plates moving along side

• Plate moving together

• Plates moving apart

Divergent plate boundaries...

• Plates moving along side

• Plates moving apart

• Plates moving together

Transform boundaries

• Plates moving alongside

• Plates moving apart

• Plates moving together

Volcanoes are found at...

• Divergent

• Transform

• Convergent- continental and continental

• Convergent - continental and oceanic

Explosive volcanoes....

• have andesitic lava

• have basaltic lava

• high viscosity

• low viscosity

Effusive eruptions have...

• Andesitic lava

• Basaltic lava

• High viscosity

• Low viscosity

How are volcano magnitudes measured?

• VAI

• VEA

• VEI

• VIE