Rocks and Minerals.

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Presentation transcript:

Rocks and Minerals

Minerals Naturally Occurring Formed from elements or compounds Inorganic Definite chemical make up and regular atomic structure Found as a solid in nature

physical chemical These are Luster Hardness Cleavage Color Composition

*The worst property for mineral ID* - Easiest to recognize Comes in many different colors Can be transparent or any other color

Different samples of Quartz

*The worst property for mineral ID* - Easiest to recognize Comes in many different colors Can be transparent or any other color The color of a minerals powder Rub a mineral across a piece of ceramic tile

Streak

The way a mineral reflects light Looks like a metal Does not look like a metal

Metallic Non-Metallic

A minerals ability to scratch or be scratched See if mineral scratches a glass plate *If it scratches glass = its harder then glass* 10 minerals placed in order of hardness Higher numbers scratch lower numbers

The ability of a mineral to break along smooth flat surfaces Look at a mineral carefully and check if light is reflecting off flat surfaces

Cleavage

The ability of a mineral to break along smooth flat surfaces Look at a mineral carefully and check if light is reflecting off flat surfaces When a mineral breaks in to pieces with uneven surfaces

Fracture

Elements that make up a mineral Quartz composition = SiO2

Unique properties some minerals have Halite = tastes salty Calcite= bubbles with HCL (hydrochloric acid)

Physical and Chemical properties oxygen silicon

Internal arrangement of atoms - Pencil lead - jewelry - lubricant - Cutting hard substances

Everywhere Dozen Minerals Building blocks coal limestone

Complete pg 6,7 in notes packet

Three Classifications of Rocks are: igneous sedimentary metamorphic

How are rocks identified? By their… 1) Composition 2) Texture Texture is not how the rock feels but the size, shape and arrangement of the materials the rock is composed of.

Sedimentary Rocks clasts

Sedimentary Rocks Cementation and Compactions of rock sediments clasts Cementation and Compactions of rock sediments Chemical precipitates from a solution

watery

- Clear layering of sediments - Found in rock outcrops

- Clear layering of sediments - Found in rock outcrops - Pieces of other rocks

- Clear layering of sediments - Found in rock outcrops - Pieces of other rocks - The remains of once living organisms

http://www.eram.k12.ny.us/education/sctemp/47599442ab8e5070f121df9cd8bba399/1255982708/sedimentary.swf Animated sedimentary rocks esrt

Complete pages 9-10 in notes packet

Igneous Rocks

Forms from the solidification of molten material (magma)

Slow to very slow Large Coarse to very coarse Plutonic (inside the earth) Slow to very slow Large Coarse to very coarse

Intrusive Igneous Rocks Big crystals

Volcanic (on the surface) Plutonic (inside the earth) Volcanic (on the surface) Slow to very slow Fast to very fast Small to non-crystalline Large Coarse to very coarse Glassy to fine

Extrusive Igneous Rocks Small crystals, or glassy texture

Another identification clue for Igneous Rocks Vesicular Texture (it has gas pockets)

Complete page 11-13 in notes packet

Metamorphic Rocks

By extreme heat and/or pressure Mountain forming events

Igneous

- Large areas of rock that undergoes intense heat and pressure. - Mountain Building Events - Molten rock comes in contact with surrounding rocks and heat alters it. * Does not melt the rock

Minerals are aligned Banding, type of foliation with bands of white and black minerals

Minerals are aligned Folded Layers Banding, type of foliation with bands of white and black minerals Folded Layers

Garnet Mica

Complete pg 15 in notes packet

Diagram that shows how rocks can become each other or themselves again

Complete packet