Term
| What causes an earthquake |
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Definition
| Earthquakes are caused by the vibrations of Earth produced by the sudden release of energy. |
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Term
| Describe the location of an epicenter and focus. |
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Definition
| Epicenter is the location on the surface of Earth directly above the focus. |
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Term
| What is the elastic Rebound hypothesis? How dose it relate to earthquakes? |
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Definition
| Elastic rebound hypothesis is the release of built- up energy. Most earthquakes are produced by the release of elastic energy stored in rocks that has been subjected to great forces. |
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Term
| Describe aftershocks and fore shocks |
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Definition
| Aftershocks are small quakes that come after a major earthquake. Fore shocks are small quakes that come before a major earthquake. |
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Term
| How are earthquakes measured? |
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Definition
| Historically, scientist have used two different types of measurement to describe the size of an earthquakes- intensity and magnitude. |
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Term
| Describe the following earthquake waves: surface, S waves, and P waves. |
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Definition
Surface waves= seismic waves that travel along Earth's outer layers. They move up, down, and side to side. Most destrictive earthquake wave. Last to arrive at the seismograph.
S waves= Shake particles at right angles to their direction of travel. Also known as traverse waves.
P Waves = They push and pull rocks in the direction the wave travelers. Also known as compression waves. The order would be P,S,Surface |
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Term
| How do scientist locate earthquakes? |
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Definition
| The difference in velocities of P waves provide a way to locate the epicenter. Scientist use a travel-time graph, in which one need at least 3 seismograph station data. |
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Term
| Where do most earthquakes occur? |
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Definition
| Most of these earthquake occur around the outer edge of the Pacific Ocean. This zone is known as the circum-Pacific belt. |
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Term
| Describe each of the different scales used to measure earthquakes. |
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Definition
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Term
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Definition
| Stable soil turns into a liquid that is not able to support buildings or other structure. |
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Term
| What causes tsunamis? What warning system is used |
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Definition
| A tsunami is called a seismic sea wave. |
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Term
| What are some other dangers that can occur due to earthquakes |
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Definition
| landslides and ground subsidence or the sinking of the ground triggered by the vibration occurs |
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Term
| Describe the layers of the earth |
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Definition
crust-lithosphere
the lithosphere consist of the crust and the uppermost mantle.
mantle- asthenosphere
soft,comparatively weak layer.
outer core- the core is liquid and is 2260 kilometers thick
inner core- solid layer having a radius of 1200 kilometers thick |
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Term
| Describe continental drift |
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Definition
| hypothesis stated that the continents had once been joined to formed a single super continent. |
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Term
| who came up with the idea of continental drift |
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Definition
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Definition
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Term
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Definition
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Term
| what kind of evidence is present to verify the idea of continental drift |
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Definition
shortlines look like they fit together.
fossil organisms found on different landmasses.
several mountain belts end at one to reappear on a landmass across the ocean.
ancient climates. |
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Definition
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Definition
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Term
| who came up with the idea of continental drift |
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Definition
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