Volcanoes and Plate Tectonics

When two plates separate a ____________ boundary is formed.

• divergent

• convergent

• transform

When one plate will subduct under the other plate a ________ boundary is formed.

• divergent

• convergent

• transform

When two plates slide past each other horizontally a _________ boundary is formed.

• divergent

• convergent

• transform

Where are some divergent boundary features? Check all that apply.

• earthquakes and volcanic eruptions are common

• forms rift valleys

• ocean trenches

Which parts of the Earth make up tectonic plates? Check all that apply.

• crust

• lithosphere

• core

• upper mantle

Tectonic plates "float" on the partially molten ________.

• asthenosphere

• lithosphere

• atmosphere

• crust

___________ boundaries create volcanic islands.

• oceanic-oceanic

• continental-continental

• oceanic-continental

• continental-oceanic

_________ boundaries are associated with mountains.

• oceanic-continental

• continental-continental

• oceanic-oceanic

• continental-oceanic

Which are characteristics of a shield volcano? Check all that apply.

• not explosive

• Mt. St. Helens is an example

• gentle slopes

• steep sides

Which are NOT characteristics of Cinder Cone volcanoes?

• steep sides

• gentle slopes

• Hawaii is an example

• made mostly of ash and cinders