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The poorest quality coal
lignite
The study of earthquakes.
seismology
Lava fragments that solidify almost immediately
tephra
This cave formation looks like waterfalls off the walls of the cave.
Flowstone.
the most common type of coal
bituminous
a belt of volcanoes that encircle the Pacific Ocean
Ring of Fire
The study of earthquakes.
seismology
Wide at the base and narrow at the top these cave formations sometimes reach from top to bottom.
Columns
The most expensive coal to mine
anthracite
What is the center portion of the Earth called.
The inner core
the strength of an earthquake is known as
magnitude
these cave formations look like pimples, wide at the bottom and rounded at the top.
stalagmites.
Petrolium in its natural form is,
Crude
What is the second layer from the center of the earth called?
The outer core
the famous scale used to measure the strength of an earthquake
Richter
The rarest most durable and beautiful gems.
precious stones
What is the middle layer of the earth called.
the Mantle
Igneous
the hardest of all known minerals
Diamond
What is the outer layer of the earth called.
The Crust.
what type of rock is limestone
Sedimentary
A rock containing metal together with impurities
Ore
What is the process that causes rocks to gradually break up and form new soil
Weathering.
what type of rock is marble?
Metamorphic
The most commonly used metal
iron
Melted Rock
Magma
what type of rock is slate
Metamorphic
The study of the earth and its structure
Geology
monsterous ocean waves caused by an Earthquake
Tsunami
What kind of rock is pumice
Igneous
The boundry between the earths crust and mantel.
Moho
holes or cracks serving as escape vents for underground gases.
Vent
what kind of rock is conglomerate?
sedimentary
Huge pieces of the earth's crust that float like rafts
plates
Volcanic fragments called "little stones"
lapilla
they hang from the cave ceiling, are long and very skinny and drip like a running nose.
Soda Straws
Underwater mountain ranges that move away from one another.
Mid Oceanic ridges
The point underground where an earthquake begins
focus
The hang from cave ceilings and look like upside down Christmas trees.
stalactites