Exploring Volcanic Types and Eruptions

Year 9 Geography Understanding Earth's Explosive Forces Types, Eruptions, and Impacts

Quick Volcano Recall

Think-Pair-Share Activity What do you already know about volcanoes? Share one interesting volcano fact with your partner Be ready to contribute to our class discussion

Three Main Types of Volcanoes

Shield Volcanoes: The Gentle Giants

Broad, gentle slopes like an ancient warrior's shield Built from fluid basaltic lava flows Effusive eruptions - slow and steady Found at hotspots and constructive plate boundaries Example: Mauna Loa, Hawaii

Composite Volcanoes: The Explosive Peaks

Steep-sided, cone-shaped mountains Built from alternating layers of lava and ash Explosive eruptions with pyroclastic flows High-viscosity magma traps gases Found at destructive plate boundaries Example: Mount Vesuvius, Italy

Eruption Styles Comparison

{"left":"Effusive Eruptions\nGentle lava flows\nLow gas content\nBasaltic magma\nPredictable timing\nLower danger to humans","right":"Explosive Eruptions\nViolent ash and gas ejection\nHigh gas pressure\nAndesitic/rhyolitic magma\nSudden and unpredictable\nExtreme danger to life"}

Critical Thinking Challenge

Why do you think composite volcanoes are more dangerous than shield volcanoes? Think about: • Magma viscosity and gas content • Eruption predictability • Population density near volcanoes • Types of volcanic hazards produced

Group Research Challenge

Form 3 groups - each takes one volcano type Research and create a mini-presentation covering: • Key characteristics of your volcano type • Real example and recent eruption • Associated hazards and impacts • Visual diagram or model Present to class in 3 minutes