• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Rocks Poweroint
 

Rocks Poweroint

on

  • 5,282 views

View PowerPoint and fill out PowerPoint worksheet.

View PowerPoint and fill out PowerPoint worksheet.

Statistics

Views

Total Views
5,282
Views on SlideShare
4,705
Embed Views
577

Actions

Likes
3
Downloads
204
Comments
0

5 Embeds 577

http://www.ustudy.in 564
http://www.slideshare.net 6
http://ustudy.in 3
http://10.0.0.4 3
http://localhost 1

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Rocks Poweroint Rocks Poweroint Presentation Transcript

    • Rocks, Rocks, and more Rocks!!!! http://en.wikipedia.org/wiki/Stone_hedge
    • What is a rock?
      • A solid mixture of crystals of one or more minerals.
    • What’s so great about rocks?
      • Used to make tools & weapons
        • Spears & arrow heads
        • Obsidian scalpels used in delicate operations
      • Used to make buildings (new & old)
      • Some contain fossils which help scientists learn about the past.
    • The Rock Cycle (pg. 82)
      • The process by which one rock type changes into another.
      • The rock cycle takes millions of years.
    • 3 processes that change one rock type to another.
      • Weathering & Erosion
      • Heat & Pressure
      • Melting & Cooling
    • 3 Types of Rocks
      • Igneous Rock
      • Sedimentary Rock
      • Metamorphic Rock
      •  Rocks are classified based on how they were formed (weathering and erosion, heat and pressure, melting and cooling).
    • Subtypes
      • Igneous, Sedimentary, & Metamorphic are divided into subtypes based on differences in how rocks are formed.
      • Two criteria:
        • 1. Composition
        • 2. Texture
    • 1. Composition
      • Composition is the minerals of which a rock is made of.
      • Examples: (pg. 85)
      • Limestone – 95% Calcite, 5% Aragonite
      • Granite – 10% Mica, 35% Quartz,
      • 55% Feldspar
    • 2. Texture
      • Texture is the sizes, shapes, and positions of the grains of which a rock is made.
        • a. Fine-grained – made of small grains
        • Ex. Silt or clay particles
        • b. Coarse-grained – made of large grains
        • Ex. Pebbles
        • c. Medium-grained – fine and medium texture
        • Ex. Sand
    • Igneous Rock
      • Igneous is Latin for “fire”
      • Igneous rock forms from cooling lava and magma.
    • Igneous - Composition Felsic vs. Mafic
      • Lighter in color
      • Less dense
      • Made up of elements such as:
        • Silicon
        • Aluminum
        • Sodium
        • Potassium
      • Ex. Granite
      • Darker color
      • More dense
      • Made up of elements such as:
        • Iron
        • Magnesium
        • Calcium
      • Ex. Basalt
    • Igneous – Texture Intrusive vs. Extrusive
      • Magma cools beneath Earth’s surface.
      • Cools very slowly
      • Coarse-grained texture
      • Large crystals
      • Ex. Granite
      • Lava cools on the Earth’s surface.
      • Cools very quickly
      • Fine-grained texture
      • Small or no crystals
      • Ex. Basalt
    • Sedimentary Rock
      • Sediment = rock fragments caused by erosion
      • Sediments are compacted and cemented together to form sedimentary rock.
      • Strata – the layers seen in
      • sedimentary rock
    • Sedimentary – Composition Clastic , Chemical , Organic
      • Clastic – fragments of other rocks and minerals
        • Size and shape of rock fragments influence the names of sedimentary rocks
        • Look at pg. 92, Figure 17 for example.
        • Ex. Conglomerate
      • Chemical – forms from solutions of minerals and water
        • Rainwater dissolves small pieces of rock and washes into the ocean where it eventually forms new minerals (Fig. 18)
        • Ex. Limestone
    • Sedimentary – Composition Clastic , Chemical , Organic
      • Organic – rock which forms from the remains of animals
        • Ex. Bituminous coal (made of plant matter)
        • What about fossils?
        • They can be found in ALL types of sedimentary rock.
    • Sedimentary – Texture Stratification
      • Stratification – layering, the layers differ depending on the kind, size, and color of the sediment.
      • - Check out Fig. 21 & 22 on pg. 94 for examples.
    • Metamorphic Rock
        • Meta means “changed”
        • Morphos means “shape”
      • The structure, texture, or composition of the rock has changed by pressure, heat, or the combination of both.
    • Origins of Metamorphic Rocks
      • Contact Metamorphism – when rocks come into contact with magma, heat “cooks” the rock
        • Change due to temperature
      • Regional Metamorphism – when a lot of pressure causes large pieces of Earth’s crust to collide with one another
        • Change due to pressure
    • Metamorphic - Composition
      • Heat and pressure cause minerals in the original rock to change into other minerals.
    • Metamorphic – Texture Foliated vs. Nonfoliated
      • Minerals are aligned by pressure
      • Looks like pages in a book
      • Ex. Slate,Phyllite
      • No regular pattern
      • One or only a few minerals
      • Ex. Marble, Quartzite