chapter 2, section 2 how minerals form friday, october 23, 2009 pages 56 -- 60 friday, october 23,...

Chapter 2, Section 2How Minerals Form

Chapter 2, Section 2How Minerals Form

Friday, October 23, 2009Pages 56 -- 60

Friday, October 23, 2009Pages 56 -- 60

ObjectiveObjective

Describe the processes by which minerals form.

Describe the processes by which minerals form.

Vocabulary WordsVocabulary Words

Magma Lava Solution Vein

Magma Lava Solution Vein

Processes That Form Magma

Processes That Form Magma

Minerals can form in two ways: Through crystallization of melted

materials. Through crystallization of materials

dissolved in water. Crystallization is a process where

atoms are arranged to form a material with a crystal structure.

Minerals can form in two ways: Through crystallization of melted

materials. Through crystallization of materials

dissolved in water. Crystallization is a process where

atoms are arranged to form a material with a crystal structure.

Mineral from MagmaMineral from Magma

Magma is molten material that hardens to form rock.

Lava is magma that reaches the surface.

When lava cools, it hardens and forms rocks.

Magma is molten material that hardens to form rock.

Lava is magma that reaches the surface.

When lava cools, it hardens and forms rocks.

Mineral from Magma -- Cont’d

Mineral from Magma -- Cont’d

Crystals form when lava cools and turns from a liquid to solid state.

The size of the crystals depend on: How fast the magma cools. The amount of gas the magma

contains. The chemical composition of the

magma.

Crystals form when lava cools and turns from a liquid to solid state.

The size of the crystals depend on: How fast the magma cools. The amount of gas the magma

contains. The chemical composition of the

magma.

Minerals from Magma -- Cont’d

Minerals from Magma -- Cont’d

Magma closer to the surface cools faster yielding smaller crystals.

Magma deep below the surface cools slowly yielding larger crystals.

Magma closer to the surface cools faster yielding smaller crystals.

Magma deep below the surface cools slowly yielding larger crystals.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Spodumeme crystal can be as large as the size of a telephone pole!

Minerals from Hot Water Solution

Minerals from Hot Water Solution

A solution is a mixture in which one substance dissolves in another.

When hot water begins to cool, the elements and compounds leave the solution and crystallize to form minerals.

A solution is a mixture in which one substance dissolves in another.

When hot water begins to cool, the elements and compounds leave the solution and crystallize to form minerals.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Silver as a pure metal -- delicate, treelike crystals are formed.

VeinsVeins

A vein is a narrow channel or slab of mineral that’s different from the surrounding rock.

Occurs when pure metals crystallize underground from hot water solutions.

A vein is a narrow channel or slab of mineral that’s different from the surrounding rock.

Occurs when pure metals crystallize underground from hot water solutions.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Minerals Formed by Evaporation

Minerals Formed by Evaporation

Minerals can form from evaporation of a solution.

Minerals can form from evaporation of a solution.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Salt crystals

Where Minerals are FoundWhere Minerals are Found

Minerals can be found on the Earth’s crust.

These minerals are not distributed evenly.

There are areas of concentration for minerals.

Minerals can be found on the Earth’s crust.

These minerals are not distributed evenly.

There are areas of concentration for minerals.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

HomeworkHomework

Workbook 2.2 due on Wednesday, 10-28.

Vocabulary quiz on 2.2 on Wednesday, 10-28.

Workbook 2.2 due on Wednesday, 10-28.

Vocabulary quiz on 2.2 on Wednesday, 10-28.