Example presentation · School
Volcanoes
What the presentation covers
Slide 1 Volcanoes
A cinematic journey into the engines that built our planet. · 1,500+ · Active volcanoes — at least one erupting every week · Of Earth's surface, above and below the sea, is volcanic in origin
Slide 2 What Is a Volcano?
Chapter 01 — The Opening · An opening in Earth's surface where molten rock, ash and gas escape from below the crust — a vent between the deep and the sky. · Magma is molten rock underground; once it breaks the surface, it becomes lava. · The word comes from Vulcan, the Roman god of fire. · Volcanoes destroy — and volcanoes create: they have built and reshaped the planet for billions of years. · Lava river, night ascent
Slide 3 Born of Moving Plates
Chapter 02 — The Engine Below · Earth's crust is broken into huge tectonic plates, drifting on the hot mantle beneath. Most volcanoes form where plates pull apart — or where one plate dives beneath another and melts. · Magma chambers — reservoirs of molten rock, miles underground · When pressure becomes too great, the mountain opens
Slide 4 Anatomy of a Volcano
Chapter 03 — The Machine · Volcanoes are mountains that build themselves, eruption after eruption.
Slide 5 Three Shapes of Fire
Chapter 04 — The Forms · Shield · Broad, gentle slopes of fluid lava. Hawaii's Mauna Loa is the largest volcano on Earth. · Stratovolcano · Tall, steep, layered cone of lava and ash. Built for violent eruptions: Fuji, Vesuvius, St. Helens. · Cinder Cone · Small, steep hill of loose fragments, often born in a single eruption. · The shape of a volcano tells you how it erupts
Slide 6 How Violent? The VEI Scale
Chapter 05 — Measuring the Blast · The Volcanic Explosivity Index rates eruptions from 0 to 8 by the volume of material thrown out — a logarithmic ladder from gentle fountains to global catastrophe. · Volcanic Explosivity Index · 0 to 8 · Krakatoa 1883 among the catastrophic
Slide 7 The Ring of Fire
Chapter 06 — Where They Gather · 1,500+ · Active volcanoes known on Earth · Of them ring the Pacific Ocean · The ring traces the edges of the Pacific plate, where ocean floor dives beneath its neighbors. · ALASKA · THE ANDES JAPAN · INDONESIA · PHILIPPINES
Slide 8 When Mountains Explode
Chapter 07 — Famous Eruptions · 79 AD · Vesuvius · Buried Pompeii in ash — the deadliest European eruption on record. · Krakatoa · Its blast was heard 4,800 km away; tsunamis killed tens of thousands. · Tambora VEI 7 · The largest in recorded history — 1816 became the “year without a summer.”
Slide 9 Living with Volcanoes
Chapter 08 — Danger and Gift · Volcanoes destroy and provide in the same breath — and people have always chosen to live on their slopes. · The Danger · Lava flows, ashfall, pyroclastic surges, mudflows and tsunamis — a single eruption can unleash them all. · The Gift · Volcanic soil is among the most fertile on Earth: farms crowd the very slopes that could erupt. Geothermal energy, hot springs and new land are volcanic gifts. · Scientists monitor earthquakes, gas and ground swelling to warn before an eruption — and save thousands of lives. · Fields on the flank — ash-rich soil, warm light, a smoking summit above
Slide 10 The Planet Is Still Building
≥1 eruption somewhere on Earth, every week · Volcanoes made the air, the oceans, the ground · Closing · Volcanoes are not accidents of geography — they are the planet’s heartbeat. Fire from the deep: the story is still being written. · Volcanoes — Fire from the Deep
Photos: Foto: ArtHouse Studio · Pexels; Foto: Daniel Torobekov · Pexels; Foto: Gylfi Gylfason · Pexels; Foto: James Lee · Pexels