1 / 10

Plate Tectonics Lesson 4

Plate Tectonics Lesson 4. Big Idea: How Do Earthquake’s Affect Earth’s Surface?. Earthquakes?. If you were holding a ruler at both ends and put pressure on both ends at the same time, the ruler will bend slightly. If you press very hard, the ruler will snap in two.

ahmed-baxter
Download Presentation

Plate Tectonics Lesson 4

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. Plate TectonicsLesson 4 Big Idea: How Do Earthquake’s Affect Earth’s Surface?

  2. Earthquakes? If you were holding a ruler at both ends and put pressure on both ends at the same time, the ruler will bend slightly. If you press very hard, the ruler will snap in two An EARTHQUAKE is a release of energy at a fault that causes Earth’s crust to shake.

  3. Here are some important terms you need to know about Earthquakes: The focus is the point inside Earth where the crust slips and releases energy. The epicenter is the point on the Earth’s surface directly above the focus.

  4. There are three types of earthquake waves: P waves are primary waves and they move with the greatest speed. S waves are secondary waves and can move up and down or side to side. Their movement looks somewhat like the letter S. Surface waves travel along the Earth’s surface. They can most of the damage to buildings in an earthquake.

  5. Measuring EarthquakesScientists study the intensity (how much shaking there is) of an earthquake with different instruments and scales. • In the early 1900’s Giuseppe Mercalli developed a scale that let people calculate the intensity of an earthquake.

  6. In 1935, Charles Richter developed an earthquake scale based on the heights of waves recorded on a seismograph. An earthquakes’ magnitude is the amount of energy it releases. The Richter Scale

  7. the magnitude of the quake Earthquake EffectsEarthquake damage depends on many factors.

  8. the distance of a place from the epicenter Earthquake damage 100 km from the epicenter the epicenterEarthquake damages 200 kilometers from the epicenter:

  9. Local geology Countries such as Japan that are surrounded by water have greater damage Softer ground shakes more than harder ground

  10. type of construction

More Related