ChestertonCC - Geo - Restless Earth - shield vs. composite

Where is the magma chamber?

• In the crust beneath a volcano.

• In the mantle beneath a volcano.

• At the top of the volcano.

• In the core beneath a volcano.

Magma rises from the _____ into the magma chamber.

• mantle

• crust

• inner core

• outer core

As magma rises into the magma chamber, pressure _____.

• increases

• decreases

Once the magma chamber reaches threshold pressure, magma is forced up and erupts out of the _____.

• vent

• tube

• composite

• shield

What is magma called when it is above the surface?

Shield volcanoes have _____ slopes.

• steep

• gentle

Shield volcanoes have a _____ base.

• wide

• narrow

Lava that erupts from shield volcanoes is _____, like Fanta.

• more viscous

• less viscous

Lava from shield volcanoes flows _____ over a _____ distance.

• quickly

• long

• slowly

• short

The pressure threshold of shield volcanoes is _____.

• high

• low