Quiz Next Monday!!!! Cartoons are due today!!!! Warm Up Presentations? With out using notes fill in the blanks for Rock Cycle and rock vs mineral worksheet Hard to read : Processes Sedimentation Volcanic Eruption create a space and place for melting Quiz Next Monday!!!! Cartoons are due today!!!!

What would happen if you tried to use a powerful machine to fold a marble bench? How are rocks able fold to naturally without first breaking? High temps and pressure and very slowly

Metamorphic Rocks Revisited Objectives Describe relationship between fault movement and forces that cause this motion Understand that earth movements can create faults and folds Understand that models help scientists understand how things work

Making a model of folds Investigate Part A Page U-40 Make 4” X 3” lump of clay Take another lump of clay on wax paper and roll it with your dowel into a sheet about 6cm thick. Drape it over base block and trim the edges. As you place the layers on the block, shape them with fingers so it matches your base block. Make sure you alternate colors. Repeat step 2 until you have 5 layers. With your new block of folded rock layers. Use you hand to stretch a 8” piece of dental floss to use as a knife to slice thru the rock layers. Sketch what you see.

What did you see? What did you see?

Making a model of faults Investigate Part B Page U-41 Get a foam block pair. Color to 2 of the layers as shown. Place the 2 cut sides face to face. Slowly Push the 2 sides together so that the upper piece slides upward. Draw side view of what happens with arrows showing dir. of force. 4. Repeat 3 except slide the lower piece upward

Fault modeling What is the difference the styrofoam moved in the 2 trials? Move the styrofoam pieces so that they slide sideways, Draw picture of what happens with arrows showing dir. of force. Part C Make a color copy of the cross section diagram on page U42. What evidence suggests that rock layers were deformed by forces within the earth? Were the forces produced by pushing forces, pulling forces, or sideways forces?

Read and take notes on faults and folding pages U43-U47 What is a Fault? Fault: a fracture surface along which rocks slip. The forces are within the earth! What are the 3 type of forces? Tension Forces-Pull blocks apart Compression Forces: Pushing blocks together Shear forces: push blocks opposite directions What are the 4 type of faults Normal faults Reverse faults Thrust faults Strike slip faults Folds: Synclines & Anticlines

3 different kinds of forces can cause a rock to deform!

Fault: a fracture surface along which rocks slip Fault: a fracture surface along which rocks slip. The forces are within the earth!

Normal Fault

Reverse Fault

Thrust faults

Rocks Folding

Exit Song (Slip) Rock Cycle Song Sedimentary rock Has been formed in layers Often found near water sources With fossils from decayers Then there’s igneous rock Here since Earth was born Molten Lava, cooled and hardened That’s how it is formed These two types of rocks Can also be transformed With pressure, heat and chemicals Metamorphic they’ll become