Observing God's World Test 6 Flashcards
3.5-3.10
the hardest known mineral; found in “pipes”
diamond
small deposits of igneous and metamorphic crystals
gemstones
any hollow space in the earth’s crust that has formed naturally and is large enough for a person to enter
cave
any rock containing a metal together with impurities
ore
the most commonly used practical metal; used for thousands of years to make tools
iron
a metal that is a good conductor of electricity; two of its alloys are brass and bronze
copper
any trace of a plant or animal left in a rock
fossil
the are surrounding a magnet in which the force of the magnet affects other objects
magnetic field
the ends of a magnet
poles
the magnetic field produced by the earth
magnetosphere
the hardest material that composes the earth’s crust
rock
solidified molten rock
igneous rock
sand and mineral fragments that have been pressed together
sedimentary
rock that has been changed by extreme heat or pressure into a new kind of rock
metamorphic
rock that covers over 75% of the earth’s surface
sedimentary
type of igneous rock that is formed at the earth’s surface, cools rapidly, and has a fine-grained appearance
extrusive
the most common igneous rock and can be found anywhere on land
granite
type of igneous rock that remains in a pocket below the surface, cools slowly, and has a coarse-grained appearance
intrusive
sedimentary rock that is formed by chemical sediments and is used for salting roads and flavoring food
halite
sedimentary rock that is used to make glass
sandstone
sedimentary rock that is the only stone formed by living animals
reef limestone
metamorphic rock which began as shale, is very hard, and has leaflike layers
slate
metamorphic rock which is perhaps one of the most beautiful and most widely used, and began as limestone
marble
type of metamorphic rock which is made up of layers like the leaves of book
foliated
hard, shiny, black coal; expensive to mine
anthracite
most common type of coal, also known as ‘soft coal’
bituminous
the poorest quality of coal, also known as ‘brown coal’
lignite
the study of caves
speleology
an animal that can live its entire life either in a cave or above ground and can go from one place to the other
troglophile
a cave that is formed by the dissolving of underground rocks by water
solution cave
the stone which caves usually form in
limestone
an animal that visits caves regularly but must return to the surface to find food
trogloxene
