Your SlideShare is downloading. ×
0
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Rocks Poweroint
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Rocks Poweroint

6,985

Published on

View PowerPoint and fill out PowerPoint worksheet.

View PowerPoint and fill out PowerPoint worksheet.

Published in: Technology, Education
0 Comments
4 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
6,985
On Slideshare
0
From Embeds
0
Number of Embeds
5
Actions
Shares
0
Downloads
272
Comments
0
Likes
4
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Rocks, Rocks, and more Rocks!!!! http://en.wikipedia.org/wiki/Stone_hedge
  • 2. What is a rock? <ul><li>A solid mixture of crystals of one or more minerals. </li></ul>
  • 3. What’s so great about rocks? <ul><li>Used to make tools & weapons </li></ul><ul><ul><li>Spears & arrow heads </li></ul></ul><ul><ul><li>Obsidian scalpels used in delicate operations </li></ul></ul><ul><li>Used to make buildings (new & old) </li></ul><ul><li>Some contain fossils which help scientists learn about the past. </li></ul>
  • 4. The Rock Cycle (pg. 82) <ul><li>The process by which one rock type changes into another. </li></ul><ul><li>The rock cycle takes millions of years. </li></ul>
  • 5. 3 processes that change one rock type to another. <ul><li>Weathering & Erosion </li></ul><ul><li>Heat & Pressure </li></ul><ul><li>Melting & Cooling </li></ul>
  • 6. 3 Types of Rocks <ul><li>Igneous Rock </li></ul><ul><li>Sedimentary Rock </li></ul><ul><li>Metamorphic Rock </li></ul><ul><li> Rocks are classified based on how they were formed (weathering and erosion, heat and pressure, melting and cooling). </li></ul>
  • 7. Subtypes <ul><li>Igneous, Sedimentary, & Metamorphic are divided into subtypes based on differences in how rocks are formed. </li></ul><ul><li>Two criteria: </li></ul><ul><ul><li>1. Composition </li></ul></ul><ul><ul><li>2. Texture </li></ul></ul>
  • 8. 1. Composition <ul><li>Composition is the minerals of which a rock is made of. </li></ul><ul><li>Examples: (pg. 85) </li></ul><ul><li>Limestone – 95% Calcite, 5% Aragonite </li></ul><ul><li>Granite – 10% Mica, 35% Quartz, </li></ul><ul><li>55% Feldspar </li></ul>
  • 9. 2. Texture <ul><li>Texture is the sizes, shapes, and positions of the grains of which a rock is made. </li></ul><ul><ul><li>a. Fine-grained – made of small grains </li></ul></ul><ul><ul><li>Ex. Silt or clay particles </li></ul></ul><ul><ul><li>b. Coarse-grained – made of large grains </li></ul></ul><ul><ul><li>Ex. Pebbles </li></ul></ul><ul><ul><li>c. Medium-grained – fine and medium texture </li></ul></ul><ul><ul><li>Ex. Sand </li></ul></ul>
  • 10. Igneous Rock <ul><li>Igneous is Latin for “fire” </li></ul><ul><li>Igneous rock forms from cooling lava and magma. </li></ul>
  • 11. Igneous - Composition Felsic vs. Mafic <ul><li>Lighter in color </li></ul><ul><li>Less dense </li></ul><ul><li>Made up of elements such as: </li></ul><ul><ul><li>Silicon </li></ul></ul><ul><ul><li>Aluminum </li></ul></ul><ul><ul><li>Sodium </li></ul></ul><ul><ul><li>Potassium </li></ul></ul><ul><li>Ex. Granite </li></ul><ul><li>Darker color </li></ul><ul><li>More dense </li></ul><ul><li>Made up of elements such as: </li></ul><ul><ul><li>Iron </li></ul></ul><ul><ul><li>Magnesium </li></ul></ul><ul><ul><li>Calcium </li></ul></ul><ul><li>Ex. Basalt </li></ul>
  • 12. Igneous – Texture Intrusive vs. Extrusive <ul><li>Magma cools beneath Earth’s surface. </li></ul><ul><li>Cools very slowly </li></ul><ul><li>Coarse-grained texture </li></ul><ul><li>Large crystals </li></ul><ul><li>Ex. Granite </li></ul><ul><li>Lava cools on the Earth’s surface. </li></ul><ul><li>Cools very quickly </li></ul><ul><li>Fine-grained texture </li></ul><ul><li>Small or no crystals </li></ul><ul><li>Ex. Basalt </li></ul>
  • 13. Sedimentary Rock <ul><li>Sediment = rock fragments caused by erosion </li></ul><ul><li>Sediments are compacted and cemented together to form sedimentary rock. </li></ul><ul><li>Strata – the layers seen in </li></ul><ul><li>sedimentary rock </li></ul>
  • 14. Sedimentary – Composition Clastic , Chemical , Organic <ul><li>Clastic – fragments of other rocks and minerals </li></ul><ul><ul><li>Size and shape of rock fragments influence the names of sedimentary rocks </li></ul></ul><ul><ul><li>Look at pg. 92, Figure 17 for example. </li></ul></ul><ul><ul><li>Ex. Conglomerate </li></ul></ul><ul><li>Chemical – forms from solutions of minerals and water </li></ul><ul><ul><li>Rainwater dissolves small pieces of rock and washes into the ocean where it eventually forms new minerals (Fig. 18) </li></ul></ul><ul><ul><li>Ex. Limestone </li></ul></ul>
  • 15. Sedimentary – Composition Clastic , Chemical , Organic <ul><li>Organic – rock which forms from the remains of animals </li></ul><ul><ul><li>Ex. Bituminous coal (made of plant matter) </li></ul></ul><ul><ul><li>What about fossils? </li></ul></ul><ul><ul><li>They can be found in ALL types of sedimentary rock. </li></ul></ul>
  • 16. Sedimentary – Texture Stratification <ul><li>Stratification – layering, the layers differ depending on the kind, size, and color of the sediment. </li></ul><ul><li>- Check out Fig. 21 & 22 on pg. 94 for examples. </li></ul>
  • 17. Metamorphic Rock <ul><ul><li>Meta means “changed” </li></ul></ul><ul><ul><li>Morphos means “shape” </li></ul></ul><ul><li>The structure, texture, or composition of the rock has changed by pressure, heat, or the combination of both. </li></ul>
  • 18. Origins of Metamorphic Rocks <ul><li>Contact Metamorphism – when rocks come into contact with magma, heat “cooks” the rock </li></ul><ul><ul><li>Change due to temperature </li></ul></ul><ul><li>Regional Metamorphism – when a lot of pressure causes large pieces of Earth’s crust to collide with one another </li></ul><ul><ul><li>Change due to pressure </li></ul></ul>
  • 19. Metamorphic - Composition <ul><li>Heat and pressure cause minerals in the original rock to change into other minerals. </li></ul>
  • 20. Metamorphic – Texture Foliated vs. Nonfoliated <ul><li>Minerals are aligned by pressure </li></ul><ul><li>Looks like pages in a book </li></ul><ul><li>Ex. Slate,Phyllite </li></ul><ul><li>No regular pattern </li></ul><ul><li>One or only a few minerals </li></ul><ul><li>Ex. Marble, Quartzite </li></ul>

×