Test 4 Flashcards
(34 cards)
the decaying plant and animal material in the soil
humus
the molten rock in the earth’s mantle
magma
very durable artificial rock
concrete
the rock that smells like mud when wet
shale
the rock used to make chalkboards
slate
material used in pencils instead of lead
graphite
a person who studies minerals
mineralogist
the hardest substance of all
quartz
a rocklike object that looks like a mudball on the outside but is filled with crystals on the inside
geode
our most useful metal
iron
the rarest gemstone
ruby
the only metal that is liquid at room temperature
mercury
the best conductor of electricity
silver
all minerals form a special kind of solid called what?
crystal
a radioactive metal used as a source for nuclear power
uranium
lighweight, nonmagnetic, rustproof metal
aluminum
a scientist who studies the structure of the earth
geologist
two types of weathering
chemical
physical
rare, beautiful minerals that are very hard but have not yet been polished
gemstones
oil in its natural state
crude oil or petroleum
an underground spring that shoots streams of boiling water and steam up into the air from time to time
geyser
a person who explores caves
spelunker
plant and animal remains that have turned to stone
petrified fossils
fossils that form when mud buries a plant or animal and then quickly hardens around it
mold fossils
