Science Reviewer

Are openings on the earth surface of a planet that allows material warmer than its surroundings to escape from its interior.

• Fault

• Volcanoes

• Epicenter

• Shield

An agency that is principally mandated to mitigate disasters that may arise from volcanic eruptions, earthquakes, tsunami and other related geotectonic phenomena.

• PAR

• SSS

• PHIVOLCS

• PAGASA

2 Classification of Volcanoes

• Active & Inactive

• Relevant & Irrelevant

• Magma & Lava

• Shield & Composite

Also called "Scoria-Cones" and has irregular shaped.

• - Also called "Stratovolcanoes"

• - Symmetrically Shaped

• - can reach grater heights

- Looks like a Warrior's Shield

• - larger crater and have low slopes

COMPONENTS OF VOLCANOES:

At high pressure, gas disolves with magma.

Are products of extraordinarily volatile-rich eruptions.

Ex. Tephra.

Mixtures of Minerals

3 TYPES OF MAGMA:

• - is high in iron, magnesium, and calcium but low in potassium and sodium.

• - low in potassium and sodium

• - 50 percent weight silica dust