Volcano Formation

Magma forms in the deepest portion of the ?? and the upper portion of the mantle.

• inner core

• outer core

• crust

• asthenosphere

Magma forms when the temperature of rock ?? , but the pressure isn’t too high.

• increases

• remains the same

• decreases

Magma usually forms at ?? plate boundaries.

• geographic

• metamorphic

• explosive

• tectonic

The magma is less dense than the surrounding rocks, so it ?? upwards.

• sinks

• rises

• freezes

The plate boundaries surrounding the Pacific Ocean have so many volcanoes, that area is called the Ring of

• Lava.

• Magma.

• Chaos.

• Fire.

?? plate boundaries are regions where tectonic plates move apart.

• Convergent

• Igneous

• Divergent

• Insurgent

As plates move apart, the mantle rises up and melts due to low pressure. This forms new ?? on the ocean floor.

• crust

• mantle

• coral reefs

• earthquakes

?? plate boundaries are regions where tectonic plates collide together.

• Convergent

• Metamorphic

• Divergent

• Insurgent

?? is when one plate moves under another.

• Divergence

• Metamorphism

• Weathering

• Subduction

?? are volcanically active places on Earth’s surface that are far from plate boundaries.

• Meteors

• Hot spots

• Lava chambers

• Pyroclastic mounds