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LMS Ch 13.1 DR

Volcanoes and Plate Tectonics Directed Reading

The cause of many volcanic eruptions is the movement of?? Earth’s tectonic plates.
The movement of tectonic plates is driven by Earth’s?? Internal heat.
Scientists can learn more about volcanic eruptions by studying?? Temperatures within Earth.
Combined temperature and pressure in the lower part of Earth’s mantle keeps rocks?? Below their melting point.
Despite high temperature, most of the mantle remains solid because of the?? Large amount of pressure from the surrounding rock.
Sometimes Earth’s solid mantle and crust melt to form?? Magma.
Which of the following is NOT a way magma can form?? Addition of fluids, such as water, increase the melting point of some minerals in the rock.
Magma rises upward through the crust because?? The magma is less dense than surrounding rock.
As hot bodies of magma rise toward the surface and melt surrounding rock?? They become larger.
Lava flows from an opening in Earth’s surface called a?? Vent.
Volcanoes erupt on Earth’s surface?? Mostly near tectonic plate boundaries.
A major zone of active volcanoes encircling the Pacific Ocean is called?? The Pacific Ring of Fire.
The Pacific Ring of Fire is also one of Earth’s major?? Earthquake Zones.
Many volcanoes are located along?? Subduction Zones.
One tectonic plate moves under another along a(n)?? Subduction Zone.
When a plate of oceanic lithosphere meets one that consists of continental lithosphere, the oceanic lithosphere?? Moves beneath the continental lithosphere.
On the ocean floor, along the edge of the continent where the plate is subducted?? A deep trench forms.
When magma rises through the lithosphere to Earth’s surface?? Volcanic mountains form along the tectonic plate.
When two plates with oceanic lithosphere at their boundaries collide?? One plate subducts, forming a trench.
If two plates with oceanic lithosphere collide?? Magma forms as fluids are introduced into the mantle.
When oceanic lithosphere subducts beneath oceanic lithosphere, magma rises to the surface to form an?? Island arc.
An example of the early stages of an island arc are the?? Aleutian Islands.
As island arcs become larger, they join to form one landmass, such as the islands that make up the?? Islands of Japan.
Volcanism?? Any activity that includes the movement of magma toward or onto Earth’s surface.
Lava?? Magma that flows onto Earth’s surface. (Only that one.)
Volcano?? A vent or fissure in Earth’s surface through which magma and gases are expelled.
Created by: ericyonggyuhong