All About Volcanoes

What is magma?

• A type of volcano

• Hot, molten rock beneath the Earth's surface

What are tectonic plates?

• The outer layer of volcanoes

• Sections of the Earth's crust that float on magma

What causes a volcano to erupt?

• Pressure from built-up magma beneath the crust

• The cooling of lava into rock

What is a cinder cone volcano?

• A small, steep-sided volcano made of loose material

• A volcano that forms under water

What makes shield volcanoes different from other types?

• They are formed by runny lava that flows far

• They erupt very violently

What is pumice?

• A volcanic rock that can float on water

• A tool used to predict volcanic eruptions

What does it mean if a volcano is dormant?

• It has just erupted

• It is 'sleeping' and may not erupt soon

How can volcanoes create new land?

• By melting ice caps

• By cooling and hardening of lava into rock

What is obsidian?

• A tool for predicting eruptions

• A hard, shiny volcanic rock

What are composite volcanoes also known as?

• Lava domes

• Stratovolcanoes