Geology Rocks! - PowerPoint PPT Presentation

About This Presentation
Title:

Geology Rocks!

Description:

Geology Rocks! Minerals – PowerPoint PPT presentation

Number of Views:90
Avg rating:3.0/5.0
Slides: 34
Provided by: MaryE3
Category:

less

Transcript and Presenter's Notes

Title: Geology Rocks!


1
Geology Rocks!
  • Minerals

2
Minerals Objectives
  • Identify the characteristics of a mineral
  • Identify the properties of minerals
  • Explain how minerals are identified
  • Describe the process by which minerals form
  • Describe how minerals are used

3
Properties of Minerals
  • A mineral is naturally occurring, inorganic,
    solid, with a crystal structure and a definite
    chemical composition
  • Each mineral has its own specific properties that
    can be used to identify it.
  • Hardness, color, streak, luster, density, crystal
    shape, cleavage and fracture are the most common
  • Special properties such as fluorescence and
    magnetism may also be used to identify minerals

4
(No Transcript)
5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
An old saying said
  • All that glitters is not gold!

11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
How minerals form?
  • Minerals may form from the crystallization of
    melted materials or the crystallization of
    materials dissolved in water
  • The size of crystals depend on how long it takes
    them to cool, the amount of gas the magma
    contains, and its chemical composition.

24
Minerals From Hot Water Solutions
  • When a mineral solution is formed with hot water
    one substance dissolves in the other
  • When the hot water solution begins to cool the
    elements and compounds leave the solution and
    crystallize
  • Silver forms like a vein, a narrow channel or
    slab of a mineral much different from surrounding
    rock

25
Minerals formed by evaporation
  • If you allow a solution to evaporate it will
    leave its salt crystals at the bottom, such as
    halite, gypsum, and calcite
  • Some minerals made by evaporation contain
    potassium, used in making fertilizers

26
Where Minerals Are Formed
  • Minerals usually are found in deposits around the
    Earth
  • Many valuable minerals are found in or near areas
    of volcanic activity and mountain building
  • There is a lot of copper near the Andes, a
    mountain chain still growing

27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
How Minerals Are Used
  • Minerals are a source of metals, gemstones, and
    other materials used to make many products
  • Metals, gemstones and useful minerals must be
    separated from their ores
  • A prospector searches for deposits
  • Strip mines, open pit mines and shaft mines are
    three different ways to extract minerals from
    their locations
  • Extractions may create severe environmental
    problems

33
(No Transcript)
Write a Comment
User Comments (0)
About PowerShow.com