difference between rocks and minerals. physical properties of mineral are the same throughout...

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


A rock formed by cooling magma below

the surface


Cooled SLOW


Contains LARGE crystals or grains


Formed INSIDE THE EARTH from MAGMA

EXTRUSIVE IGNEOUS ROCK


A rock formed by cooling lava on the surface


cooled FAST


Contains SMALL Crystals or Grains


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

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