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Exploring Plate Tectonics: A Journey Through Earthquake Science

Dive into the world of plate tectonics with lessons on earthquake vibrations, wave types, seismology, plate boundaries, and earth's structure. Understand concepts like liquefaction, subduction zones, and the Ring of Fire.

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Exploring Plate Tectonics: A Journey Through Earthquake Science

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  1. Plate Tectonics 7th Grade Science

  2. Lesson 1 • Earthquake- vibrations in the earth caused by sudden release of energy, as a result of the movement of rocks along a fault • Seismologist- scientist who studies earthquakes

  3. Lesson 2 • Earthquake Waves • P-Wave: primary wave, first and compressional (back and forth) • S-Wave: secondary, second and moves at right angles, much rougher • Surface Waves: Elliptical and back and forth on surface of earth, most destructive

  4. Lesson 3 • Seismogram- paper that records earthquake • Seismograph- device that measures an earthquake’s intensity • Epicenter – imaginary point on earth that sits on top of the focus • Focus – where the earthquake begins inside the earth

  5. Lesson 4 • Plate Boundary-pieces of broken lithosphere meet, 3 types Convergent (collide), Divergent (divide) and transform (slide) • Ring of Fire-encircles the Pacific Ocean, an area of volcanic and earthquake activity • Magnitude- measure of total amount of energy released in an earthquake, each interval 32 times more energy is released • Intensity- measure of damage done during an earthquake

  6. Lessons 1-4 Challenge Words • Liquefaction: strength and stiffness of soil is reduced by earthquake shaking, occurs in saturated soils and allows soil particles to move (think of liquid vs. solid) • Lithosphere: crust and uppermost mantle, where earthquakes occur • Subduction Zone: 2 lithospheric plates come together

  7. Lesson 5 • Parts of the Earth (inside to outside)-think of our apple • Inner Core/like the seeds of an apple • Outer Core/pocket that holds the seeds • Mantle/meaty part of the apple-what you eat • Lithosphere/bite out of the apple-upp.mantle/crust or a plate • Crust/skin of the apple

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