1 / 33

Science Shake, Rattle, and Roll

Science Shake, Rattle, and Roll. Chapter 8. What Causes Earthquakes, and How Can They Be Compared?. Earthquake is a vibration of Earth, caused by release of energy that has been stored along a fault. Most occur along tectonic plate boundaries. Think about this….

gustave-corp
Download Presentation

Science Shake, Rattle, and Roll

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Science Shake, Rattle, and Roll Chapter 8

  2. What Causes Earthquakes, and How Can They Be Compared?

  3. Earthquake is a vibration of Earth, caused by release of energy that has been stored along a fault. Most occur along tectonic plate boundaries

  4. Think about this… • What do you think happens when an earthquake occurs? • What kind of damage could these events cause?

  5. Guatemala, 197623,000 people killed Mexico , 1985 9,000 people killed

  6. Earthquakes happen on faults.Who can remember the name of the fault line that runs along the length of California?

  7. Aerial photo of the San Andreas Fault 720 miles long

  8. Aftershock- is a shock that occurs after the first shock of the earthquake.

  9. Richter Scale • Are numbers ranging from 1 to 10 that describes the magnitude, or strength, of an earthquake. • Named after American scientist Charles Richter • Minor earthquakes are under 4 • Major earthquakes are over 5

  10. Magnitude- is the amount of energy released by the quake.

  11. Focus- the point at which an earthquake begins Epicenter- the point on Earth’s surface directly above the focus of an earthquake

  12. What do you call a scientist that studies earthquakes? Seismologists

  13. Predicting Earthquakes • Seismologist have found that there are changes in the earth before earthquakes happen. • So, they watch instruments that measure and record these changes.

  14. How do scientists measure the strength of an earthquake, and how can they predict future earthquakes?

  15. Lesson 1 review • Where do earthquakes occur? • What is an earthquake? • What is the smaller earthquake like activity the happens after the first earthquake? • Who studies earthquakes? • How can you predict an earthquake?

  16. What Happens To Earth’s crust During an Earthquake? How are Earthquakes Located and Measured?

  17. Seismograph Seismic waves are recorded by this instrument

  18. Pendulum seismograph measures side to side movements. Spring seismograph measures up and down movements.

  19. Chinese created the first earthquake detectors known as Chang Heng’sseismoscope in AD132.

  20. Tsunamis Is a seismic sea wave forms when earthquakes hit the ocean floor.

  21. DESTUCTIVE WALLS OF WATER

  22. Causes of Tsunamis • Earthquakes on the sea floor • Landslides on the ocean floor • Volcanic eruptions

  23. Tsunami Facts • Can begin at 3ft and can reach a height of 46ft when it strikes land. • Travels at 500 mph

  24. Before After Loss of land Loss of grass/trees

  25. Predicting Tsunamis 1946 the Tsunami Warning System was established to warn people. Two warning centers in the USA near Anchorage, Alaska and near Honolulu, Hawaii. Tsunami sensors that rest of the ocean floor. These sensors are very sensitive and can detect a change in sea level of less than millimeter.

  26. Chapter 8 Review Vocabulary Aftershock Earthquake Fault Richter Scale Seismograph Seismologist Tsunami Magnitude Epicenter focus

  27. Short Answer Questions: • What kind of damage could these events cause? • How do scientists measure the strength of an earthquake, and how can they predict future earthquakes • What three things Happen to Earth’s crust during an Earthquake?

  28. Test Questions: • What is an earthquake? • Where do earthquakes occur? • What is the smaller earthquake like activity the happens after the first earthquake? • Who studies earthquakes? • How can you predict an earthquake? • What causes a tsunami? • What are the two kinds of seismographs and what kind of movements does each measure?

  29. Test Question :What is this a picture of?

  30. Test Question:What is this a picture of?

  31. Bonus:1. What is this a picture of?2. What is this called?3. What country did it come from?

More Related