Joint School District No. 2; Boise, Eagle, Meridian, Star

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Unit 2 Rock Cycle

Unit 2: Rock Cycle (part 1)--Basic Rock Cycle, Igneous, Weathering, Soil, Erosion

Igneous Rocks Reading Wksht: Complete the worksheet using the internet.  On the last question, please indicate that you were at home when you completed the worksheet

Rock Cycle Poster: make a poster of the rock cycle that includes all of the words listed on this wksht

Igneous Rock Notes: Print this out, ask a friend to describe it to you, and then SAVE it for the lab and the test coming up.

Igneous Rock/Pluton Lab: (make up assignment for igneous rock lab and pluton demo lab). Use the internet as a reference.

Weathering Powerpoint:  be familiar with the information in this powerpoints. for the worksheet that goes with here.

Make a powerpoint: Weathering: (Extra Credit assignment) If you want some extra credit, complete this  assignment and email a copy to me.

Weathering candy Lab make up:  follow the lab instructions using any type of substance that will dissolve (the lab calls for salt but you can use candy also)

Soils worksheet: use the internet as a reference for this worksheet

Dirt Lab: (make up assignment for the dirt lab). Use the internet as a reference.

Avalanches: snow, mud, etc.: use internet to find answers to these questions.

Erosion wksht: use the internet to find the answers

Mass wasting definitions: use internet to define types of mass wasting.  (this is the make up assignment for the mass wasting songs)

Weathering/Erosion/Deposition powerpoint assignment: follow the instructions on this sheet to create a powerpoint. Save your powerpoints in the following folder: "student classwork" --> "hand in" --> "Nawrocki" --> select your class period --> SAVE IT WITH YOUR NAMES IN THE TITLE!!!!!!!!

Igneous, Weathering, Erosion Study Guide: Use your fact packet, worksheets, notes, and the internet to find the answers to these questions.



Unit 2: Rock Cycle (part 2)--Deposition, Sedimentary, Metamorphic

Sedimentary Rocks reading (make-up): Use the internet to find the answers to these questions.

Sedimentary Rocks Powerpoint: This is a reference. Please read through it and make sure that you understand the concepts in it. If you do not, please contact me or use the internet for further reference.

Sedimentary Rocks Identification chart: Complete this chart as a reference to do the lab below. Use the internet as a reference.

Sedimentary Rocks Identification Lab (make-up): Complete this lab using the sedimentary rock identification chart and the sedimentary rocks powerpoint as a reference. You may also use the internet as a reference.

Metamorphic Rock notes:  This is a powerpoint you may want to print out and keep in your notes before next class (hint hint). Be sure you read through it and understand it.  There is nothing to turn in for this.

Metamorphic Rock Identification chart: Print this out also before next class--nothing to do on it, just read through and understand it.

Rock Cycle Test (part 2) Study Guide: Use notes, worksheets, internet, etc. to complete this.  The test will be open note and open study-guide. You will be given abt 30 minutes in class to complete this and then we will take test.


Concepts From This Unit

Rock Cycle (Part 1)--Basic Rock Cycle, Igneous, Weathering, Soil, Erosion

  1. The rock cycle describes the geologic processes that change one type of rock into another type of rock.
  2. Rocks are composed of two or more minerals and are classified as igneous, sedimentary, or metamorphic.
  3. The interactions between Earth’s internal energy source (fission/radioactive decay in the core) and external energy source (fusion in the sun) drive the rock cycle.
  4. Igneous rock is the product of volcanoes and the cooling of magma. The slower the magma cools the larger the mineral crystals in the rock. Coarse-grained rocks have large, visible crystals and cooled slowly underground.  Fine-grained rocks have no visible crystals or look glassy and cooled quickly above the surface.
  5. High silica magmas are thick and produce light colored igneous rocks. The most common high-silica rock is granite.  Low silica magmas are fluid (thin) and produce dark colored igneous rocks. The most common low-silica rock is basalt.
  6. All rocks disintegrate when exposed to weather producing smaller particles of broken rocks called sediments.
  7. Weathering is the wearing away or breaking down of rock due to the forces of water, wind, ice, etc. The two types of weathering are mechanical and chemical.
  8. Chemical weathering is the process of breaking down rocks by changing the chemical composition. This process occurs most rapidly in hot, wet climates. Examples of things that can chemically weather include: oxygen, acid rain, water, carbon dioxide, etc.
  9. Mechanical weathering is the process of breaking down rocks into smaller pieces, changing the size and shape, common in dry climates. Examples of mechanical weathering include ice wedging, root wedging, abrasion, exfoliation, etc.
  10. Ice expands when it freezes. Ice wedging causes the rock to break down mechanically because of pressure changes due to the expansion of ice when it freezes.
  11. Soil is the product of the weathering of rocks and organic material on Earth’s surface.
  12. The rate at which soil forms depends on the climate and type of rock. Soil forms faster in humid climates.  Sandstone and limestone weather easier than granite.
  13. Erosion is the transporting or moving of the weathered material by the force of water, wind, ice, or gravity. The heavier the sediment is the more energy is required to carry it.  Smaller particles of sediment are generally carried the farthest.
  14. All mass movement is the result of gravity. Examples of mass movement include slumps, slides, falls, and creep)

Rock Cycle (Part 2)--Deposition, Sedimentary, Metamorphic

  1. Deposition is when sediment settles out of the water, wind, or ice that is carrying it, putting it in a new location (depositing it).  When the energy of transport lessens (when the river slows down, for example), the sediment is deposited.  The big, heavy stuff is usually deposited first.
  2. Sedimentary rocks can form in three ways: 
    1. Clastic: formed from sediments that have been cemented and compacted together.
    2. Chemical: formed from chemicals dissolved in water that collect together to form crystals. 
    3. Organic: formed by or contain living things (such as shells or corals).
  3. Sedimentary rocks form from the cementation, or gluing together of the weathered sediments, and the compaction, or influence of pressure.
  4. When sedimentary or igneous rock is exposed to enormous heat and pressure it becomes metamorphic rock.

Last Modified 3/15/2013 12:13 PM