VOLCANOES

KILAUEA VOLCANO, HAWAII

• Kīlauea is a shield volcano in the Hawaiian Islands
• the most active of the five volcanoes that together form the island of Hawaiʻi

MT. VESUVIUS, ITALY

• Mount Vesuvius is a stratovolcano in the Gulf of Naples
• It is one of several volcanoes which form the Campanian volcanic arc.

PLATE TECHTONICS

• A volcano is an opening in the earth's crust that allows molten rock from the mantle to flow out onto the surface as lava.
• Most volcanoes are formed by the movement of tectonic plates
• These plates are basically huge pieces of rock that ‘float’ on the mantle
• The tectonic plates are in constant motion, albeit very slow motion.

MAGMA AND LAVA

• Magma is under the ground
• Lava is already erupted

ACTIVE VOLCANOES

EXTINCT VOLCANOES

ENVIROMENTAL EFFECT

• tiny liquid droplets of sulfuric acid erupted into the stratosphere can change our planet's climate temporarily.
• A serious environmental effect of volcanoes is burial by ash, mud, or lava.
• During heavy ash-rains houses and buildings may collapse.