3.1-2
What's the boundary between the crust and mantle called?
moho
volcanic fragments or "little stones"
lapilla
2 types of Igneous rocks
Obsidian and pumice
poorest quality of coal
lignite
any trace of animal/ plant found preserved
fossil
gradual breakdown of rocks
weathering
solidified lava fragments
tephra
2 types of sedimentary rocks
limestone and conglomerate
most common type of coal
bituminous
this metal is good for conducting electricity
copper
parts of the crust that shift
plates
monstrous ocean waves
tsunamis
2 types of metamorphic rock
marble and slate
most expensive type of coal
athracite
the area around a magnet that produces the "pull"
magnetic field
underwater mountain ranges
mid-oceanic ridges
magma
rare, beautiful gems
precious stones
petroleum in its natural form is called ____ oil
crude
the end of a magnet are called
poles
study of the earth's srtucture
geology
study of earthquakes
seismology
a rock that contains metal and impurities
ore
most commonly used metal
iron
over 75% of the earth's surface is covered with ____ rock.
sedimentary