Earth & Space Ch.7 Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
| Term | Definition |
| aftershock | smaller earthquakes that follow the main earthquake |
| asthenosphere | A subdivision of the mantle situated below the lithosphere. this zone of weak material exists below a depth of about 100 kilometers and in some regions extends as deep as 700 kilometers. the rock within this zone is easily deformed. |
| body wave | Seismic waves that travel through Earth's interior. |
| core | Located beneath the mantle, it is the inner most layer of earth. the core is divided into an outer core and an inner core. |
| crust | the very thin outermost layer of earth |
| earthquake | the vibration of earth produced by the rapid release of energy. |
| elastic rebound | the sudden release of stored strain in rocks that results in movement along a fault. |
| epicenter | the location on earth's surface that lies directly above the focus of an earthquake. |
| fault | a break in a rock mass along which movement has occurred. |
| focus | the zone within earth where rock displacement produces an earthquake. |
| foreshock | small earthquakes that often precede a major earthquake. |
| inner core | the solid innermost layer of earth, about 1,300 kilometers (800) miles in radius. |
| intensity | a measure of the degree of earthquake shaking at a given locale based on the amount of damage. |
| liquefaction | a phenomenon, sometimes associated with earthquakes, in which soils and other unconsolidated materials containing abundant water are turned into a fluid-like mass that is not capable of supporting buildings. |
| lithosphere | the rigid outer layer of earth, including the crust and upper mantle. |
| magnitude | the total amount of energy released during an earthquake. |
| mantle | the 2,900-kilometer- (1,800-mile-) thick layer of earth located below the crust. |
| Modified Mercalli Intensity Scale | a 12-point scale developed to evaluate earthquake intensity based on the amount of damage to various structures. |
| moment magnitude | a more precise measure of earthquake magnitude than the Richter scale that is derived from the amount of displacement that occurs along a fault zone. |
| outer core | A layer beneath the mantle about 2,200 kilometers (1,364) thick that has the properties of a liquid. |
| primary waves or P waves | a type of seismic wave that involves alternating compression and expansion of the material through which it passes. |
| Richter scale | a scale of earthquake magnitude based on the motion of a seismograph. |
| secondary waves or S waves | a seismic wave that involves oscillation perpendicular to the direction of propagation. |
| seismic gaps | a segment of an active fault zone that has not experienced a major earthquake over a span when most other segments have. such segments are probable sites for future major earthquakes |
| seismic sea waves | large undersea earthquakes occasionally set in motion massive waves that scientists call? |
| seismic waves | a rapidly moving ocean wave generated by earthquake activity capable of inflicting heavy damage in coastal regions. |
| seismogram | the record made by a seismograph. |
| seismograph | an instrument that records earthquakes wave |
| seismology | the study of earthquakes and seismic waves |
| surface wave | seismic waves that travel along the outer layer of earth. |
| tsunami | the Japanese word for a seismic sea wave |
| Plate tectonics theory | the theory that proposes that earth's outer shell consists of individual plates that interact in various ways and thereby produce earthquakes, volcanoes, mountains, and the crust itself. |
Created by:
1493084379
Popular Earth Science sets