Questions and Answers Project Questions: Dangerous and Natural Energy Food Chains and Food Webs A look ahead to Unit 5.

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Presentation transcript:

Questions and Answers Project Questions: Dangerous and Natural Energy Food Chains and Food Webs A look ahead to Unit 5

 All of the earthquake information was obtained from  IRIS is the “Incorporated Research Institutions for Seismology”

Magnitude 8.8 OFFSHORE MAULE, CHILE Saturday, February 27, 2010 at 06:34:17 UTC A great 8.8-magnitude struck central Chile early Saturday. The quake hit 200 miles (325 kilometers) southwest of the capital Santiago. The epicenter was just 70 miles (115 kilometers) from Concepcion, Chile's second-largest city. AP Photo/David Lillo Vehicles that were driving along a highway that collapsed during the earthquake near Santiago are seen overturned on the asphalt Saturday Feb. 27, 2010 after an 8.8- magnitude earthquake struck central Chile early Saturday. USGS

This earthquake occurred on the subduction zone plate boundary at the Peru – Chile Trench where the oceanic Nazca Plate subducts beneath the continental South American Plate. The red star on the map below shows the epicenter of the earthquake while the arrows show the direction of motion of the Nazca Plate toward the South American Plate. At the location of this earthquake, the two plates are converging at a rate of about 8 cm/yr. Magnitude 8.8 OFFSHORE MAULE, CHILE Saturday, February 27, 2010 at 06:34:17 UTC Nazca Plate South American Plate UNAVCO

The map on the right shows historic earthquake activity near the epicenter (star) from 1990 to present. As shown on the cross section, earthquakes are shallow (orange dots) at the Peru - Chile Trench and increase to 300 km depth (blue dots) towards the east as the Nazca Plate dives deeper beneath the South American Plate. Magnitude 8.8 OFFSHORE MAULE, CHILE Saturday, February 27, 2010 at 06:34:17 UTC Seismicity Cross Section across the subduction zone showing the relationship between color and earthquake depth. A A’ USGS

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 ml ml

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 What impact would an invasive/exotic species have?  Other human impacts

 Reading  Return to space: the solar system  Discussion: Natural disasters and equilibrium  Seminar: Equilibrium in a living system - Menopause  Final project reminder: how does science affect your daily life…