BELL RINGER What is the hardest known mineral and what is its
hardness? ROCKS Most rocks are mixtures of minerals. TWO TYPES OF
ROCKS: 1.Monominerallic made up of just one type of mineral. Ex:
Rock salt : mineral is halite Ex: Limestone : mineral is calcite
2.Polyminerallic a mixture of minerals Ex: Granite= quartz,
feldspar, biotite, amphibole Rocks are classified according to
their origin How they formed What they formed from Temperature and
pressure as they formed THREE CLASSIFICATIONS OF ROCKS: 1.Igneous
formed from fire (magma, lava) 2.Metamorphic changed in form
WITHOUT MELTING 3.Sedimentary made of sediments that are cemented
together Geology Kitchen
