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23 Cards in this Set

  • Front
  • Back
fracture
smashed rock, like glass
cleavage
smashed rock, smoothe
flouresence
changes colour under ultra violet light.
crystal
occurs in a well developed shape
streak
powdery mark of a rock
hardness
being able to scratch another mineral
minerals
pure, natural substance found in earths crust
colour
property thats sometimes used to find minerals
geologist
someone who studies rocks
magnetsim
attracts a magnet or needle
luster
surface of mineral that reflects light.
rock
earth materials made of 1 or more minerals
name 3 rock properties
colour, luster, flouresence
3 main types of rocks are:
igneous sedimentary metamorphic
how are igneous rocks formed?
by magma
what is magma?
its molten rock found underground
what is sediment?
large groups of soil and pebbles pressed into tight layers.
how is sedimentary rocks formed?
by the compression of sediments
what are metamorphic rocks?
they change their characteristics
how is metamorphic rocks formed?
extreme heat by sedimentary and igneous rocks.
3 examples of igneous rocks
lava rock, pumice, basalt
3 examples of sedimentary rocks
sandstone, limestone, shale
3 examples of metamorphic rocks
graphite, coal,