Flashcards
Earthquakes Flashcards
Flashcards do conjunto (23)
- 1a fracture in the Earth where movement has occurredA fault
- 2the place on the surface directly above the focusEpicenter
- 3When an earthquake occurs, energy radiates in all directions from its source, called the ____.focus
- 4Which seismic waves travel most rapidly?P waves
- 5Which seismic waves compress and expand rocks in the direction the waves travel?P waves
- 6Overall, which seismic waves are the most destructive?surface waves
- 7What is the minimum number of seismic stations that is needed to determine the location of an earthquake’s epicenter?three
- 8A travel-time graph can be used to find the ____.distance to the epicenter of an earthquake
- 9An earthquake’s magnitude is a measure of the ____.size of seismic waves it produces
- 10What instrument records earthquake waves?seismograph
- 11The amount of shaking produced by an earthquake at a given location is called the ____.intensity
- 12What layers of Earth make up the lithosphere?the crust and upper mantle
- 13boundary between the crust and the mantleThe Moho Discontinuity
- 14Through which Earth layer are S waves NOT transmitted?outer core
- 15The location on Earth’s surface above the point where an earthquake starts is theEpicenter
- 16The springing back of rock after it has been deformed is known as ____________________.Elastic Rebound
- 17What are the three types of seismic waves?Primary
Secondary
Surface - 18Which type of force causes a normal fault?Tension
- 19Which type of force causes a reverse fault?Compression
- 20Which type of force causes a transform fault?Shearing
- 21Secondary waves move _____ to the direction the waves are traveling.At right angles
- 22Secondary waves do not travel through this layer of the EarthOuter Core
- 23Sea waves caused by an underwater earthquakeTsunami
Informações
- Descrição
- 9th Geology FlashCards sobre Earthquakes Flashcards, criado por Brian Hedspeth em 15-11-2013.
- Criado por
- Brian Hedspeth
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