- 1,500 active volcanoes in the world
- Japan has more than 100 volcanoes
- The longest lava flow is from a volcano in Hawaii and it is called Poo-oo ohoh
- A volcano is a rupture in the Earth's crust that allows volcanic gasses and ash and lava to escape
- Mount st. Helen is a volcano in Washington
- Super volcanoes have to be a magnitude 8 and have rock coming out also
- The upper part of the mantel is called the Asthenosphere
- The Earth's crust is made up of 7 tectonic plates
- When plates collide we can have mountains, volcanoes erupt, earthquakes happen, and geothermal things occur
- Hydrothermal occurs are snow and rain goes through the crust and comes up 4,000 years later
- The ocean plate sinks under the continental plate and that can make beaches.
- Volcanoes are formed by magma pushing up through the Earth's crust and emerges as lava and then the lava cools into rock
- 7 major plates and other smaller ones
- Volcanic ash is a danger to an airplane
- Eruptions can have landslides or rocks flying or tsunamis
- Rocks that come out of volcanoes are called igneous rocks
- Obsidian is formed by lava cooling super fast
- Basalt can be found on the moon
- Granite is not found in volcanoes
- Riolite holds pressure in until the cone is blown of
- There are shield volcanoes, cinder cone volcanoes, and submarine volcanoes
- Volcanoes can make new habitats and can kill lots of people
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