2. Earthquakes and Volcanoes

3. Earthquake - shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity

4. San Francisco Earthquake 1906

5. Alaska Earthquake 1964

6. This image shows what can happen outside buildings during an earthquake. It shows a debris-strewn street in California, after the 1906 San Francisco Earthquake. IF THE GROUND SEEMS TO GLIDE, STAY INSIDE!

7. Following an earthquake, these railroad tracks show the bending and folding power of plate movement.

8. Volcano - an opening in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

9. Formation of a Volcano

10. Paracutin Volcano, Mexico

11. Mount St. Helens

13. Cinder Cone Volcano

14. Mount Vesuvius Images of victims in eruption of Vesuvius in 79 AD. Most died as a result of suffocation.

15. Mount Vesuvius

17. VOLCANIC MOUNTAIN NAMIBIA IN AFRICA

18. What is the relationship between the Earth’s plates, volcanoes, and earthquakes?

19. http://www.extremescience.com/PlateTectonics map.htmPlates

20. Earthquakes

21. http://hsv.com/scitech/earthsci/quake.htmVolcanoes

22. Let’s look at those maps again.

23. Plates Earthquakes Volcanoes

24. Earthquakes and Volcanoes are found where plates meet.

25. Seismic Waves – waves of force that travel through the earth as a result of plate movement (i.e. earthquakes and volcanoes)

26. Seismic Risk Map of the U.S.

27. Seismometer - gives an early warning that a tsunami is coming

28. Seismograph records energy waves of the earth

29. Ring of Fire – an area where a large number of earthquakes and volcanic activity occurs in the Pacific Ocean

30. Focus - is the point underground where the rocks begin to move during an earthquake

31. Tsunami – a series of large water waves caused by plate tectonic movement

32. Earthquakes in the ocean cause

33. Destruction 30’ Wall of Water

34. Epicenter - is the point above ground where the earthquake begins

35. Richter Scale – assigns a single number to quantify the amount of seismic energy released by an earthquake

36. Stress – is released by earthquakes when it has been built up enough