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APSC 151 Week 5 Questions And Answers
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Jupiter ~ largest planet gas giant strong magnetic field counter rotating layers in the atmosphere mantle composed of metallic hydrogen Has 79 orbiting moons Saturn ~ second-largest and sixth planet from the Sun; has a complex ring system, at least 31 moons, and a thick atmosphere made m...

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  • August 5, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • apsc 151 week 5 questions and answers

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APSC 151 Week 5 Questions
And Answers

Force


✓✓✓✓~ A push or pull exerted on an object




Stress


✓✓✓✓~ Force applied to a given area

Varies by direction in a solid




Pressure


✓✓✓✓~ In a liquid is equal in all directions




Strain


✓✓✓✓~ Changes the size or shape of a rock body caused by stress




Compressive stress formula


✓✓✓✓~ L-Lo/Lo

,What creates strains in the earths crust


✓✓✓✓~ Continuous tectonic plate movement




Deformation: Types of stress


✓✓✓✓~ 1. Differential stress - applied unequally from different directions

2. Compressional stress - shortens a rock body


3. Tensional stress - elongates a rock body


4. Shear stress - changes the shape of a rock body




Deformation of a rock body


✓✓✓✓~ All of the changes in the original form/size of a rock body




Where do most crustal deformations occur


✓✓✓✓~ Along or near plate margins




Crystal deformation


✓✓✓✓~ Under directed pressure from tectonics, atoms move (slowly) within a solid to
create shortening in one direction




Ways rocks can deform

, ✓✓✓✓~ 1. Elastic deformation - recoverable deformations (ex. like a spring)

2. Brittle fracture - break into pieces (ex. like a broken bone)


3. Ductile deformation - permanent deformation without breaking (ex. bending a

wire)




Geologic structures


✓✓✓✓~ 1. folds

2. faults


3. joints




How to map geological structures


✓✓✓✓~ 1. determine the steepest angle or inclination from horizontal to the plane

2. Indicate dip direction (bearing or azimuth of the dip)


3. The strike (azimuth 90 degree to dip direction)




How rocks form


✓✓✓✓~ Temperature and confining pressure




Ductile deformation process

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