Volcanoes
What are the three phases of a volcano?
➡️ Active, dormant, extinct
What causes volcanic eruptions?
➡️ Pressure buildup from magma rising to the surface
What are tectonic plates?
➡️ Huge pieces of Earth’s crust that move slowly
What does W.E.D. stand for?
➡️ Weathering, Erosion, Deposition
What are the four types of volcanoes?
➡️ Shield, cinder cone, composite/stratovolcano, lava dome
What are two effects of volcanic eruptions?
➡️ New landforms, ash falls, lava flows, cooling climate, etc.
What layer of Earth do we live on?
➡️ The crust
What is weathering?
➡️ Breaking down rock
What are the main parts of a volcano?
Magma chamber, vent, crater, lava flow, ash cloud
What signs show a volcano might erupt soon?
➡️ Earthquakes, gas release, ground swelling
Name Earth’s three main layers.
➡️ Crust, mantle, core
What is erosion?
➡️ Moving rock or soil
What is the difference between magma and lava?
➡️ Magma is inside Earth, lava is outside.
True or False: All eruptions look the same.
➡️ False — eruptions can be explosive or gentle.
What happens when plates move apart?
➡️ New crust forms / mid-ocean ridges
What is deposition?
➡️ Dropping off sediments to build new land
Which type of volcano is usually the tallest and most explosive?
➡️ Composite volcano
What role do gases play in eruptions?
➡️ More gas = more explosive eruption
Why do many volcanoes form at plate boundaries?
➡️ Plates colliding or separating lets magma rise
How can a volcano cause W.E.D.?
➡️ Ash breaks rock (weathering), lava shapes land (deposition)