Difference Between Rocks and Minerals
Dec 23, 2015
Difference Between Rocks and Minerals
Physical Properties of mineral are the same
throughout
Physical Properties of rocks vary from one part of the
rock to another
Rocks are classified according to origin (where
and how it formed)
either: Igneous, Metamorphic, or
Sedimentary
Minerals are classified according to their chemical
composition and the arrangement of their atoms
IGNEOUS ROCKS
FOLLOWS WORKSHEET(GET OUT WORKSHEET)
Igneous rock is rock formed by the cooling and hardening
of molten rock
Synonyms for SolidificationCrystallization
& Hardening
Magma- liquid rock beneath the
earth’s surface
Lava- Liquid rock that has
reached the Earth’s surface
The only difference between magma and lava is LOCATION
The solid grains or pieces of mineral that form when
molten rock cools and hardens are called
CRYSTALS
If a rock has only one kind of mineral crystal it is called
MONOMINERALLIC
If a rock has more than one kind of mineral crystals it is called POLYMINERALLIC
Monominerallic vs. Polyminerllic
(Will Draw on Board)
SIZE OF MINERAL CRYSTALS
Large crystals form deep within the Earth. Small
crystals form close to the Earth’s surface
The faster the cooling the SMALLER the crystals, or the slower the cooling the
LARGER the crystals
INTRUSIVE IGNEOUS ROCK
INTRUSIVE IGNEOUS ROCK
A rock formed by cooling magma below
the surface
INTRUSIVE IGNEOUS ROCK
Cooled SLOW
INTRUSIVE IGNEOUS ROCK
Contains LARGE crystals or grains
INTRUSIVE IGNEOUS ROCK
Formed INSIDE THE EARTH from MAGMA
EXTRUSIVE IGNEOUS ROCK
EXTRUSIVE IGNEOUS ROCK
A rock formed by cooling lava on the surface
EXTRUSIVE IGNEOUS ROCK
cooled FAST
EXTRUSIVE IGNEOUS ROCK
Contains SMALL Crystals or Grains
EXTRUSIVE IGNEOUS ROCK
Formed on the surface of the Earth from lava
TEXTUREFancy name for
Crystal size or how the surface feels
Coarse Texture mean LARGE CRYSTALS
Fine texture means SMALL CRYSTALS,
makes it more difficult to identify
Glassy Texture means very rapid cooling
resulting in no crystals
ex. Obsidian
PUMICE- type of lava rock, rough
surface with very low density, cooled rapidly
trapping in gasses