EARTHSCI L3 Q2

MAGMA

Is composed of semi-liquid hot molten rocks located beneath the Earth, specifically in the melted mantel rock and oceanic plate

MAGMA CHAMBER

Where is magma found?

LAVA

Found on the surface of the Earth once the volcano errupts

MAGMATISM

A process under the Earth’s crust where formation and movement of magma occur

ASTHENOSPHERE

Location where magmatism occurs, the lower part of the crust and the upper portion of the mantle

PARTIAL MELTING

formed through the process of different minerals in rock melt at different temperatures and pressures such as water and carbon dioxide

HEAT TRANSFER

Happens when heat is transferred from hotter molten rocks to Earth’s cold crust, it often happens at tectonic boundaries, where tectonic plates are crashing together

MID-OCEAN RIDGE

Location of where decompression melting occurs, the underwater mountain system

DECOMPRESSION MELTING

Solid mantle rocks subjected to high pressure go upward to shallower levels, triggering the melting of magma

FLUX MELTING

Triggered when water or carbon dioxide is added to hot rocks, decreasing the melting point of a rock, occuring around subduction zones

MOUNT MAYON

One of the most active volcanoes of the Philippines

PHILIPPINE INSTITUTE OF VOLCANOLOGY AND SEISMOLOGY

PHIVOLCS

AN INCREASE IN TEMPERATURE

Which of the 3 required events for melting in the mantle does heat transfer occur?

A DECREASE OF PRESSURE

Which of the 3 required events for melting in the mantle does decompression melting occur?

ADDITION OF VOLATILES

Which of the 3 required events for melting in the mantle does flux melting occur?