Ch. 5  Sec. 1  Classifying Rocks YouTube video-Bill Nye Rocks Rock Harder Song
Discover Activity-How do rocks compare?  Pg. 144 Marble Shale  Color  Texture  Which is harder? Which is denser?
rock made of mixtures of minerals and other materials
geologists observe rock’s 1.  mineral composition 2.  color 3.  texture
1. mineral composition <ul><li>made of mixtures of minerals & other materials </li></ul>
rock-forming minerals <ul><li>about 20 minerals make up most of rocks of crust </li></ul>
2. color <ul><li>gives clues to rock’s mineral composition </li></ul>
Granite  is usually a  light colored rock  that has a high silica content.
Basalt  is usually a  dark colored rock  that has a low silica content.
3. texture <ul><li>Look & feel of a rock’s surface </li></ul>
3 Different Rocks How are these rocks  different from one another? How are they similar?
grains <ul><li>particles of minerals or other rocks </li></ul><ul><li>gives rock its texture </li></ul>
grain shape <ul><li>ex: </li></ul><ul><ul><li>exploding stars </li></ul></ul><ul><ul><li>crystal shapes </li></ul></ul><ul...
Weathering Affects Grain Shape
grain pattern <ul><ul><li>flat layers </li></ul></ul><ul><ul><li>random </li></ul></ul><ul><ul><li>banded </li></ul></ul><...
 
Layered or random grains ? Layered grains
Nonbanded or banded grain pattern banded grain pattern
grain size <ul><li>coarse grained = large & easy to see </li></ul><ul><li>fine grained = grains so small- need  microscope...
 
 
Types of Rock video clip
Rocks Game
Make model of granite Name that rock activity
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6th Grade-Ch. 5 Sec. 1 Classifying Rocks

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6th Grade-Ch. 5 Sec. 1 Classifying Rocks

  1. 1. Ch. 5 Sec. 1 Classifying Rocks YouTube video-Bill Nye Rocks Rock Harder Song
  2. 2. Discover Activity-How do rocks compare? Pg. 144 Marble Shale Color Texture Which is harder? Which is denser?
  3. 3. rock made of mixtures of minerals and other materials
  4. 4. geologists observe rock’s 1. mineral composition 2. color 3. texture
  5. 5. 1. mineral composition <ul><li>made of mixtures of minerals & other materials </li></ul>
  6. 6. rock-forming minerals <ul><li>about 20 minerals make up most of rocks of crust </li></ul>
  7. 7. 2. color <ul><li>gives clues to rock’s mineral composition </li></ul>
  8. 8. Granite is usually a light colored rock that has a high silica content.
  9. 9. Basalt is usually a dark colored rock that has a low silica content.
  10. 10. 3. texture <ul><li>Look & feel of a rock’s surface </li></ul>
  11. 11. 3 Different Rocks How are these rocks different from one another? How are they similar?
  12. 12. grains <ul><li>particles of minerals or other rocks </li></ul><ul><li>gives rock its texture </li></ul>
  13. 13. grain shape <ul><li>ex: </li></ul><ul><ul><li>exploding stars </li></ul></ul><ul><ul><li>crystal shapes </li></ul></ul><ul><ul><li>rock fragments- smooth, rounded or jagged </li></ul></ul>conglomerate
  14. 14. Weathering Affects Grain Shape
  15. 15. grain pattern <ul><ul><li>flat layers </li></ul></ul><ul><ul><li>random </li></ul></ul><ul><ul><li>banded </li></ul></ul><ul><ul><li>nonbanded </li></ul></ul>quartzite
  16. 17. Layered or random grains ? Layered grains
  17. 18. Nonbanded or banded grain pattern banded grain pattern
  18. 19. grain size <ul><li>coarse grained = large & easy to see </li></ul><ul><li>fine grained = grains so small- need microscope </li></ul><ul><li>some have no visible grain </li></ul>Diorite is _______ grained. coarse
  19. 22. Types of Rock video clip
  20. 23. Rocks Game
  21. 24. Make model of granite Name that rock activity

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