EARTH SCIENCE REVIEW
DIFFERENCE BETWEENCONSTRUCTIVE AND DESTRUCTIVEFORCES Constructive forces build up the earth’s surface Destructive wear a...
LAYERS OF EARTH   Lithosphere- consists of crust and top of mantle     Separates into plates     Meets at plate boundar...
PANGEA All the continents were once joined together in a  super continent Continents fit together like puzzle pieces
SEA FLOOR SPREADING Two oceanic plates moving away from each other  (diverging) The ocean floors move like conveyor belt...
SEA FLOOR SPREADING AND PLATETECTONICS   Convection currents is the engine that drives the    plates to move
TYPES OF PLATE BOUNDARIES Convergent Divergent Transform
WHAT HAPPENS WHEN PLATESCOLLIDE? Oceanic/Oceanic- the older plate (more dense  plate) will subduct Oceanic/Continental- ...
DEFORMATIONS CAUSED BYSTRESS Anticlines Synclines Plateaus
TYPES OF FAULTS Strike- Slip Fault Reverse Fault Normal Fault
FOCUS AND EPICENTER Focus- point BENEATH Earth’s surface where  rock under stress breaks to cause an earthquake Epicente...
SEISMIC WAVES P Waves- compress and expand the ground like  an accordion (happen first) S Waves- vibrate from side to si...
SCALES FOR MEASURINGEARTHQUAKES Mercalli Scale- rates earthquakes based on  damage Richter Scale Moment Magnitude scale
RISK FACTORS FOR EARTHQUAKES Shaking Liquefaction Aftershocks Tsunamis
DEVICES TO MONITOR AND DETECTEARTHQUAKES   tiltmeter
WHERE DO VOLCANOES FORM? Convergent boundaries Divergent boundaries Hot spots
TYPES OF VOLCANOES Composite Shield Cinder cone
PARTS OF A VOLCANO
ACTIVITY OF VOLCANOES Active Dormant Extinct
MAGMA AND LAVA Magma is molten rock under the ground When magma reaches the Earth’s surface, it is  called lava
SILICA AND MAGMA’S VISCOSITY Silica determines viscosity The more silica, the more viscous a substance is More silica m...
HOW DOES TRAPPED GAS EFFECT AVOLCANO’S ERUPTION?   As magma rises toward the surface, the pressure    decreases and the d...
Earth unitreview
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Earth unitreview

  1. 1. EARTH SCIENCE REVIEW
  2. 2. DIFFERENCE BETWEENCONSTRUCTIVE AND DESTRUCTIVEFORCES Constructive forces build up the earth’s surface Destructive wear away earth’s surface
  3. 3. LAYERS OF EARTH Lithosphere- consists of crust and top of mantle  Separates into plates  Meets at plate boundaries Asthenosphere- located under lithosphere; what the lithosphere glides on top of
  4. 4. PANGEA All the continents were once joined together in a super continent Continents fit together like puzzle pieces
  5. 5. SEA FLOOR SPREADING Two oceanic plates moving away from each other (diverging) The ocean floors move like conveyor belts, moving the continents away from each other New crust is formed where the plates are spreading
  6. 6. SEA FLOOR SPREADING AND PLATETECTONICS Convection currents is the engine that drives the plates to move
  7. 7. TYPES OF PLATE BOUNDARIES Convergent Divergent Transform
  8. 8. WHAT HAPPENS WHEN PLATESCOLLIDE? Oceanic/Oceanic- the older plate (more dense plate) will subduct Oceanic/Continental- oceanic plate subducts because it is more dense Continental/Continental- forms mountain ranges
  9. 9. DEFORMATIONS CAUSED BYSTRESS Anticlines Synclines Plateaus
  10. 10. TYPES OF FAULTS Strike- Slip Fault Reverse Fault Normal Fault
  11. 11. FOCUS AND EPICENTER Focus- point BENEATH Earth’s surface where rock under stress breaks to cause an earthquake Epicenter- point on the surface directly above the focus
  12. 12. SEISMIC WAVES P Waves- compress and expand the ground like an accordion (happen first) S Waves- vibrate from side to side and up and down Surface Waves- when waves reach the surface (cause most damage)
  13. 13. SCALES FOR MEASURINGEARTHQUAKES Mercalli Scale- rates earthquakes based on damage Richter Scale Moment Magnitude scale
  14. 14. RISK FACTORS FOR EARTHQUAKES Shaking Liquefaction Aftershocks Tsunamis
  15. 15. DEVICES TO MONITOR AND DETECTEARTHQUAKES tiltmeter
  16. 16. WHERE DO VOLCANOES FORM? Convergent boundaries Divergent boundaries Hot spots
  17. 17. TYPES OF VOLCANOES Composite Shield Cinder cone
  18. 18. PARTS OF A VOLCANO
  19. 19. ACTIVITY OF VOLCANOES Active Dormant Extinct
  20. 20. MAGMA AND LAVA Magma is molten rock under the ground When magma reaches the Earth’s surface, it is called lava
  21. 21. SILICA AND MAGMA’S VISCOSITY Silica determines viscosity The more silica, the more viscous a substance is More silica magma is light colored and is too sticky to flow far Less silica magma flows readily and produces dark colored lava
  22. 22. HOW DOES TRAPPED GAS EFFECT AVOLCANO’S ERUPTION? As magma rises toward the surface, the pressure decreases and the dissolved gases begin to expand and exert an enormous force
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