Earthquakes

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School

Front Range Community College *

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Course

111

Subject

Geography

Date

Jul 1, 2024

Type

docx

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Uploaded by ColonelSeahorse2504

Name: _Kelsey Gross ____________________________ Cracked plates https://esriurl.com/earthGeoInquiry6 ENGAGE Click the URL above to launch the map. 1. Where have you heard of earthquakes occurring? I have heard of earthquakes occurring all over the world, but mostly in the Pacific Ocean in an area known as The Ring of Fire. Earthquakes also happen along the areas where the tectonic plates meet, called fault lines. 2. Is there a pattern to the quakes that students have heard about? I’m not sure about a pattern, but when an earthquake happens, it is usually because the plates are moving. With the Details button underlined, click the button, Show Contents of Map (Content). Turn on the layer, Global Quakes Of Large Magnitude 5.8 Or Greater. 3. What patterns are visible where quakes occur? Quakes occur on both continents and oceans, where most people think they just occur in the oceans and we get the aftershocks. There are exceptions. 4. What is happening to the area within a ring of earthquakes? The area moves as one piece so there is no collisions happening in a single piece of crust called a plate. EXPLORE Turn on the layer, Relative Motion At Plate Boundaries. Note that you will not see anything until you perform the next step. Press the button, Bookmarks. 5. Select each bookmark and describe the plate movement at the bookmark. South America would have a direct collision, California would have a side swipe, and the Mid Atlantic would be torn apart. EXPLAIN Earthquakes occur where large pieces of the earth’s crust run into, pull away from, or slide against other pieces of independent crust. Turn on the layer, Plate Boundaries. Click the layer name, Plate Boundaries, to see its legend. Choose each bookmark in turn (South America, California, and Mid Atlantic Ridge).

6. What are plates that collide head-on called? Convergent. 7. What are boundaries called where plates are stretched apart? Divergent. 8. What are boundaries called where plates are in a side-swipe collision? Transform. Turn off the layer, Global Quakes Of Large Magnitude 5.8 Or Greater. ELABORATE Turn on the layer, South American Quakes. Pan the map to South America. Hover over the layer name, South American Quakes. Click the button, Change Style. Change the attribute (#1) from Show Location Only to Depth_km. The new symbology draws dots larger according to how deep quakes occur. Click Done to apply these changes. 9. Do these earthquakes occur only at the boundary between plates? No, they spread out, but only in one direction. 10. Suggest a hypothesis for what is happening to these colliding earthquakes. Because earthquakes happen where plates touch and only on the continent side, South America must be on top of the Pacific crust. 11. Construct a three-row table where earthquakes occur compared to plate boundary types. Quakes compared to boundary Pattern of depths of quake Convergent Only one side Gets deeper under continent Divergent Close boundary More shallow and random Transform Both sides of boundary Mixed depths and random EVALUATE Turn on the layer, Caribbean Quakes. 12. Determine which type of plate boundary occurs here based on your table. It is a transform boundary.

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