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Published byReginald Walton Modified over 5 years ago
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What happens to the Earth’s magnetic field over time?
Quick Question: What happens to the Earth’s magnetic field over time? How did scientists discover this? Where would you find the youngest crust? Why is it there? Hyperlink to flip video
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Plate Tectonics: We Didn't Start the Fire Either!
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Investigating Paleo magnetism
& the Ocean Floor
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Today’s Objective: I understand how energy travels through the Earth
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2. Safety Concerns. Create a circle concept map about Earthquakes.
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Where do most people live?
QQ: Key: City Plate Earthquake Volcano Is there a relationship between plate boundaries and volcanoes & earthquakes? Why do you think this is? Where do most people live? What implications does this have for civilization? How does this affect the role of scientists? 5 min to take attendance
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Do you notice a pattern? What does it tell you?
Focus Depth Key: km km km What does it tell you?
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What implications does this have for civilization?
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How does this affect the role of scientists?
5 min discussion
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The Question: How is energy from earthquakes spread?
What’s First? The Question: How is energy from earthquakes spread? Hyperlink map to video Research: Map of Virginia
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Can animals predict earthquakes?
Hyperlink text box to video of animals at zoo Can animals predict earthquakes?
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Earthquakes: sudden release of energy from the Earth causing shaking
Stress on rock becomes stronger than the rock’s strength Rock break and releases energy Energy travels in waves
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Largest movement of earthquake felt here:
Epicenter: Point on surface directly above focus Focus: The point in the lithosphere where the rock breaks
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Where do epicenters occur?
Fracture Fault Rock is weaker than pressure and stress upon it.
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Hypothesis: Procedure: Time movement of springs
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Data: WAVE TYPE: TRIAL # TIME OBSERVATION (SKETCH AND DESCRIPTION) 1 2
3 AVERAGE WAVE TYPE
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P – Waves: Push and Pull Primary Waves Practice pushing and pulling the slinky toward you a bit and then pushing it away. Complete observation in data chart. 3 trials timing the wave as it does one complete trip back and forth. Find the average of your data.
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S – Waves: Side to Side Secondary Waves
Flat on table S – Waves: Side to Side Secondary Waves Practice moving the slinky side to side parallel to the table. Complete observation in data chart. 3 trials timing the wave as it does one complete trip back and forth. Find the average of your data.
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L – Waves: Up and Dow Love Waves Practice moving the slinky up and down perpendicular to the table. Complete observation in data chart. 3 trials timing the wave as it does one complete trip back and forth. Find the average of your data.
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ANALYIZE THE DATA: DESCRIBE WHAT YOU NOTICE ABOUT THE 3 TYPES OF WAVES. ARE THERE ANY PATTERNS IN YOUR DATA?
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Conclusion: How are the types of waves alike?
How are the types of waves different? What difference do you predict this makes on studying earthquakes?
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Waves caused by movement inside the Earth
Seismic Waves Waves caused by movement inside the Earth Original Force: Where rocks broke Energy being transferred down the line
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Measures seismic waves
Seismograph: Measures seismic waves
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Measures earthquakes by graphing the waves of energy
SEISMOGRAPH Measures earthquakes by graphing the waves of energy
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P-Waves (Primary) Push and pull underground rocks Causes structures on the surface to move back and forth Least powerful Fast
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S-Waves (Secondary) Horizontal: Rocks move from side to side Damaging effects Slower Only through rock
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L-Waves (Love) Vertical and sideways: Rocks move up and down
Occurs on surface Fastest of all Most destructive
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Rocking and Rolling!
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Splish Splash...I was taking a bath!
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Series of huge waves caused by earthquakes under the ocean
Tsunami Series of huge waves caused by earthquakes under the ocean Tidal Wave
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- Things you learned today - Questions you still have
Exit Ticket - Things you learned today - Questions you still have 1 - Connection outside of this room
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