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Plates Voclanoes Earthqueake - junior cert
Question | Answer |
---|---|
Name the 3 layers forming the earth | The Core, the Mantle (Inner + Outer) and the Crust |
What is the core made up of? | The Core is made of Molten Magma - red hot ! |
What causes the magma to move within the Mantle? | Convection Currents |
What causes the creation of The Mid Ocean Ridge? | Two Plates moving apart from each other causes a little gap and some magma seeps out and creates a ridge |
How is a volcano which erupts regularly described? | Active |
If a volcano erupts only infrequently, it's said to be ... | Dormant |
A volcano which never erupts anymore is called ... | Extinct |
When 2 plates collide what happens to the heavier plate? | The heavier plate sinks under the lighter plate in an action known as SUBDUCTION |
Name the type of current responsible for the movement of the crustal plates! | Convection Currents! |
What is the name given to scientists who study volcanoes? | Vulcanologists |
Name the rock type formed by the molten lava which flows out during a volcanic eruption | Igneous |