Volcanic Activity (Leaving Cert Geography): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
What is pyroclastic material?
What is pyroclastic material?
Materials ejected from a volcano like ash and rocks.
What occurs during subduction?
What occurs during subduction?
One tectonic plate is pushed beneath another plate.
Who studies volcanoes?
Who studies volcanoes?
A volcanologist studies volcanoes and their activity.
What are plutons?
What are plutons?
Granite structures formed from cooled magma underground.
What is a caldera?
What is a caldera?
A large cauldron-like depression formed by a volcano.
What are the main components of silica?
What are the main components of silica?
Silica primarily consists of silicon and oxygen.
How does a volcano form?
How does a volcano form?
Magma forces its way to the surface through a vent.
What is magma called when it erupts?
What is magma called when it erupts?
When it reaches the surface, magma is called lava.
Where are most volcanoes located?
Where are most volcanoes located?
In the Pacific Ring of Fire, which has 75% of them.
What happens at divergent plate boundaries?
What happens at divergent plate boundaries?
Tectonic plates pull apart, creating fissures and eruptions.