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G10 plate tectonics
This document discusses plate tectonic theory and provides examples of evidence that supports it. It describes the three main types of plate boundaries: convergent where plates move toward each other, divergent where they move apart, and transform where they slide past each other. Examples of tectonic activity occurring at boundaries are provided, such as volcanoes and earthquakes. Diagrams show the process of seafloor spreading at divergent boundaries and how convection currents in the mantle drive plate movements globally.
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G10 plate tectonics
- 1. Prepared By: JOHNEL VILLANUEVAESPONILLA Science Instructor G10
- 2. Learning Competency Describe and relate the distributionof active volcanoes, earthquake epicenters, and major mountain belts to Plate Tectonic Theory Content standard The relationship among the locations of volcanoes, earthquake epicenters, and mountain ranges. Performance standard 1. Demonstrate ways to ensure disaster preparedness during earthquakes, tsunamis, and volcanic eruptions. 2. Suggest ways by which he/she can contribute to government efforts in reducing damage due to earthquakes, tsunamis, and volcanic eruptions.
- 4. PLATE TECTONICS It isa scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, since tectonic processes began on Earth between 3.3 and 3.5 billion years ago.
- 5. PLATE TECTONICS AlfredWegener was born in Berlin in 1880, where his father was a minister who ran an orphanage. From an early age he took an interest in Greenland, and always walked, skated, and hiked as though training for an expedition. He studied in Germany and Austria, receiving his PhD in astronomy.
- 7. P T T E CT O N I C S H E O R Y L A T E
- 8. EVIDENCE OF PLATETECTONICS THEORY the fit of the continents locations of fossil species glacial till deposits the shift of climates over time
- 9. S T S P RE A D I N G H E O R Y EA FLOOR
- 11. 1. Hot mantlefrom the two adjacent cells rises at the ridge axis, creating new ocean crust. 2. The top limb of the convection cell moves horizontally away from the ridge crest, as does the new seafloor. 4. The material sinks to the core and moves horizontally. 3. The outer limbs of the convection cells plunge down into the deeper mantle, dragging oceanic crust as well. This takes place at the deep-sea trenches. 5. The material heats up and reaches the zone where it rises again.
- 12. P L AT E B O U N D A R Y
- 13. WHAT IS A PLATE BOUNDARIES? arethe edges where two plates meet. Most geologic activities, including volcanoes, earthquakes, and mountain building, take place at plate boundaries.
- 14. TYPES OF PLATE BOUNDARIES? 1. CONVERGENTBOUNDARY 2. DIVERGENT BOUNDARY 3. TRANSFORM BOUNDARY
- 15. TYPES OF PLATE BOUNDARIES? 1. CONVERGENTBOUNDARY The two plates move towards each other
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- 18. TYPES OF PLATE BOUNDARIES? 2. DIVERGENTBOUNDARY The two plates move away each other
- 19. TYPES OF PLATE BOUNDARIES? 3. TRANSFORMBOUNDARY The two plates move slip past each other
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Editor's Notes
- #9 Alfred Wegener proposed that the continents were not stationary, but actually moving or drifting away from one another. His primary sources of evidence included: (UP) Plate tectonic theory became an accepted ideas in the 1970s due to magnetic shifts, convection currents, and sea floor spreading
- #12 The top limb of the convection cell moves horizontally away from the ridge crest, as does the new seafloor. The outer limbs of the convection cells plunge down into the deeper mantle, dragging oceanic crust as well. This takes place at the deep-sea trenches. The material sinks to the core and moves horizontally. The material heats up and reaches the zone where it rises again.