Unit 5 Part 2 - Volcano’s

Volcano

Mountains or hills formed by cooled magma

Lava

Molten rock

intensity

The measure of force, brightness

oceanic crust

It is about 200 million years old. It has an average thickness of 7.5 to the 10 Kilometers

Shield volcano

A volcano with soft slopy sides

magma

A hot molten rock found underneath earth crust

Center cone volcano

A steep Chronicle Hill formed by lava

earthquake

A release of energy in the Earth crust that makes the ground shake

Rayligh waves

waves that move across the surface of solids

mantle

The largest layer making up 84% of earths total volume

Continental drift

The gradual movement of the continents where they begin to break into pieces and move away from us from each other from each other about 200 million years ago

crust

It is the outside thin layer of earth. This is exactly where we live

radiation

It is the transfer of energy through empty space where there is no direct contact between a heat source and an object

Alfred WEGENER

He is a German scientist to propose the continental drift theory

subduction

They happen in areas where tectonic plate plates collide the plate is pushed below each time Ticktock plates

cratons

The most stable and the oldest part of the continental crust these are found deep in the interior of most continents and one composed of the ancient crystalline basement rock

plate boundary

The areas where two plates meet separate our slide past each other

tectonic plates

And your regular shaped huge slab of solid rock that is moving in different directions