composed of two basic rock types granite and basalt
What is crust
200
the hardest natural substance found on earth
What is diamonds
200
flows with the consistency of asphalt
What is the mantle
300
is a extrusive igneous rock, It is the bedrock of the ocean floor and also occurs on land in extensive lava flows
What is basalt
300
caused by the very hot material at the deepest part of the mantle rising, then cooling, sinking again and then heating, rising and repeating the cycle over and over.
What is Convection Currents
300
When rock from the mantle melts, moves to the surface through the crust, and releases pent-up gases.
What is how volcanoes erupt.
400
Underground, they are formed when the melted rock, called magma, deep within the earth becomes trapped in small pockets. As these pockets of magma cool slowly ......
What is how igneous rocks form
400
Hawaii, Alaska, California, Oregon and Washington,
What is places with Active volcanoes
500
a type of Metamorphic Rock
What is; Amphibolite, Marble, Phyllite or Schist
500
An erupting volcano can trigger
what is tsunamis, flash floods, earthquakes, mudflows and rockfalls.