rocks unit p.94

Download Rocks Unit P.94

Post on 06-Feb-2016




0 download

Embed Size (px)


Rocks Unit P.94. Set Up Your Cornell Notes Open your big red textbook to page 94. Hand in your progress report Late work is due, grades go in the computer tomorrow. Rocks Unit P.94. Standard IIIA: Earth Structure and Processes - PowerPoint PPT Presentation


  • Rocks Unit P.94Set Up Your Cornell Notes

    Open your big red textbook to page 94.

    Hand in your progress report

    Late work is due, grades go in the computer tomorrow.

  • Rocks Unit P.94Standard IIIA: Earth Structure and ProcessesThe student will identify Earths composition, structure and processes.The student will classify and identify rocks and minerals using characteristics including but not limited to density, hardness and streak.The student will describe the various processes and interactions of the rock cycle.

  • Learning Objectives Rocks & the Rock CycleDescribe the rock cycle and each of its processes.Describe the three types of rocks, how they formed and how they are classified and identified.Be able to identify rocks as either Igneous, Metamorphic or Sedimentary.

  • .Minerals make up rocks.Natural compounds and elements combine to form minerals.Elements combine to form the natural compounds.Rocks make up the Earth.There is a hierarchy to the elements of Geology Atoms make up elements.

  • Rocks and the Rock CycleChapter 4Rock - a mixture of one or more minerals, mineraloids, volcanic glass and/or organic (living) matter

  • Rocks and the Rock CycleChapter 4The Rock Cycle:Shows the processes by which Earth materials change to form the 3 different types of rocks.

  • Interactive Rock Cycle Animation

  • Rocks and the Rock CycleChapter 4 Page. 96There are three main types of rocks:

    1. Igneous rocks formed from magma or lavaClassified based onA. Origin (Where & How they formed)Intrusive or ExtrusiveB. Texture (size of crystals/grains)C. Chemical (Mineral) composition.(Basaltic or Andesitic or Granitic)

    2. Metamorphic rocks changed from heat and pressure deep undergroundClassified based on their texture.(Foliated or Non-foliated)

    3. Sedimentary rocks formed from compacted sedimentsClassified based on the composition & origin of the sediments.(Detrital or Chemical or Organic)

  • Classifying Igneous RocksIGNEOUS ROCKS - rocks that formed from the cooling and crystallization of magma or lava.Igneous rocks are classified three ways;by where they were formed (Intrusive or Extrusive)Texture (size of crystals)by their chemical composition. (Basaltic or Andesitic or Granitic)


  • Igneous Rocks - Origin1. Extrusive igneous rocks (aka Volcanic rocks) form at the earth's surface as lava cools.Forms small crystals (cant see with naked eye).These rocks have a fine (small) crystalline texture.

    ExamplesBasalt RhyoliteScoria (no crystals)Pumice (no crystals)Obsidian (no crystals)

  • Igneous Rocks - Origin2. Intrusive igneous rocks (aka Plutonic Rocks) form deep underground where magma cools slowly.Forms large crystals to form that are easily seen.These rocks have a coarse (large) crystalline texture.


  • Igneous Rocks - Chemical CompositionIgneous rocks are also classified by their chemical composition.Basaltic (aka Mafic) Igneous rocks composed of mostly Iron (Fe) and Magnesium (Mg).dark and higher densitiesExamples: Basalt, GabbroAndesitic Igneous rocks (aka Intermediate chemical composition).Chemically In between granitic and basaltic.Examples: Andesite, DioriteGranitic (aka Felsic) Igneous rockscomposed mostly of Silicon (Si), Oxygen (O) and Aluminum (Al).Light in color and lower densityExamples: Granite, Rhyolite

  • Igneous Rocks P. 93BasalticCompositionIntermediateCompositionGraniticComposition

  • How do Metamorphic Rocks Form? P. 110Set up Your Cornell Notes

    Open Your Text To Page 110.

    Hand in Classifying Igneous Rocks

    Progress Reports Due Thursday

  • Metamorphic Rocks P. 110Metamorphic rocks are rocks that have been changed in form due to heat, pressure, and chemical alteration deep underground.They are classified by the arrangement of the mineral grains

    1. FOLIATED The mineral grains flatten and line up in parallel bands or layers.Examples of foliated Metamorphic RocksSlate Schist Gneiss

    2. NONFOLIATED- Mineral grains change, grow and rearrange but dont form bands.Examples of non-foliated Metamorphic RocksMarble Quartzite

  • Metamorphic Rocks P. 110Metamorphic Rocks DO NOT MELT!Minerals can grow larger in size.Elements can rearrange and bond with different elements in the rock to form new minerals.

    Example : Pick up the Greenstone on your desk

  • Metamorphic Rocks P. 110There are Levels of MetamorphismSlate (less heat & pressure)PhylliteSchistGneiss (more heat & pressure)

  • Metamorphic Rocks P. 110Examples of rocks changing into met. Rocks due to heat and pressure.

    Shale (sed) changes to slateBasalt (Ig) changes to schistBasalt (Ig) can also change to greenstoneSandstone (sed) changes into QuartziteSlate (met) changes into phyllite (met) then schist (met) then gneiss (met)Granite (Ig) changes into granite gneiss

  • Sedimentary Rocks P.102Hand in Metamorphic Rocks (assigned Friday).

    Open Your Text To Page 102

    Set Up Your Cornell Notes

  • Sedimentary Rocks P. 102Sediments are broken pieces of rocks and minerals.Clay, silt, sand, gravel, cobble, boulder are sizes of sediments

    Weathering is the process of breaking rocks into smaller pieces by wind, water, glaciers and gravity.

    Erosion and deposition is the process of MOVING (transporting) these materials.

  • Sedimentary Rocks P. 102Sedimentary Rocks form when sediments are compacted (squeezed) and cemented (glued) together.

    Sedimentary rocks can also be formed by evaporation or precipitation from solution.

    Most sedimentary rocks are formed of layers of materials that have washed into lakes, rivers, and the ocean.

  • Sedimentary Rocks P. 102There are 3 groups of Sedimentary Rocks 1. Clastic (detrital) Sedimentary Rocks form from bits and pieces of other rocks. 2. Chemical Sedimentary Rocks consist of minerals deposited from a solution. 3. Organic Sedimentary Rocks consist of organic matter such as plants and animal remains.

  • Sedimentary Rocks1. Detrital (Clastic) Sedimentary Rocks Rocks formed from the compaction and cementation of sediments.

    Weathering and erosion by gravity, rivers, ice/glaciers, wind, and waves carry sediment.

    ExamplesConglomerateSandstone Shale

  • Sedimentary Rocks

  • Sedimentary Rocks2. Organic Sedimentary Rocks

    Organically-formed sedimentary rocks form from the remains of plants and animals.

    ExamplesFossil limestone CoalCoquinaChalk

    Why cant igneous or metamorphic rocks have fossils?

  • Sedimentary Rocks

  • Sedimentary Rocks3. Chemical Sedimentary Rocks

    Chemically-formed sedimentary rocks come from minerals carried in solution into lakes and seas.

    The minerals that form the rock precipitate out or are left when the solution evaporates.

    ExamplesLimestone (calcium carbonate) Gypsum (calcium sulfate) Salt (sodium chloride)

  • Rocks and the Rock Cycle - Chapter 4 PowerPoint PresentationYou and your group will create a PowerPoint Presentation on three types of rock and the rock cycle.Each member is responsible for completing the research for the presentation using his/her textbook. Use the handout provided and complete the outline. Each member completes a section of the outline. All members then review the information and check for accuracy.All members work together in putting the information into the slide show. *You cannot begin the show until your research is completed.Diagrams, examples and pictures of rocks can be added by using the links on our web site.Copy, Paste any pictures you use do NOT save them on the computer!Save all work into your groups folder.

  • Rocks and the Rock Cycle - Chapter 4 PowerPoint PresentationRubric for Scoring: PossibleEarnedTitle Slide with names and group picture3 pts._____Metamorphic rock is formed when3 pts. _____Types of metamorphic rock and definitions 4 pts. _____ Examples: picture and name (2)4 pts. _____Igneous rock is formed when3 pts. _____Types of igneous rock and definitions4 pts. _____Examples: picture and name (2)4 pts. _____Sedimentary rock is formed when3 pts. _____Types of sedimentary rock and definitions6 pts. _____Examples: picture and name (3)6 pts. _____The Rock Cycle explanation6 pts. _____Rock Cycle Diagram4 pts. _____Questions/Presentation5 pts. _____Total 55 pts. _____

  • Type your title hereGroup Name:


  • Metamorphic Rock by:Metamorphic rock is formed when

    Types of metamorphic rock:


  • Igneous Rock by:Igneous rock is formed when

    Types of igneous rock:


  • Sedimentary Rock by:Sedimentary rock is formed when

    Types of sedimentary rock:


  • The Rock Cycle by:Explanation:

  • Questions by:1.



  • Monday January 12, 2009Get out your Roger rough draft.Due Today with Roger changing three times.Underline sentence where Roger changes.

    Revisions: Re-read your paper (especially the changes) and revise using Post-its (at least 3)

    Mr Anderson will grade your rough draft TODAY!

    Final Paper AND rough draft are due Friday.

    Here the intent is to show how the various pieces; atoms, elements, compounds, and minerals, rocks and even the Earth, are related to each other in a hierarchy. Classroom exercise- Take some road salt (larger pieces of rock salt used to melt ice and snow) and have the students look at them and describe what they see. A magnifying glass is very handy here. S


View more >