cenozoic era test
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36 terms
Terms | Definitions |
|---|---|
 what event ended the mesozoic & began the cenozoic? | the great extinction |
| what new forms of plant life evolved during the cenozoic?(2) | grasses more land above sea level |
| what new forms of life animal evolved during the cenozoic?(2) | birds mammals |
| what major continental events occured during the cenozoic?(3) | mountain building in western america continues ring of fire is developed australia seperates from antarctica |
| describe the climate changes that occured throughout the cenozoic. (2) | notably drier much warmer than it currently is |
| valley glacier (3) | confined to mountain valleys found in mountain regions long, narrow, thick |
| continental glacier | flow outward, all directions found only in greenland & antarctica very thick |
| p wave "primary wave" (4) | earthquake wave that pushes & pulls rock into the direction of the wave also known as a compression wave greatest velocity travels through: solids, liquids, gases |
| s wave "secondary wave"(3) | travels on earths outer layers right angle to the direction they travel travel only through solids |
| surface waves | seismic waves that travel along out layers |
| how is the power of an earthquake measured?(2) | magnitude & intensity richter ; momentum magnitude |
| how are the locations of earthquakes identified? | travel time graphs from atleast three stations |
| seismogram | the record made by a seismograph |
| siesmograph | instrument that records earthquake waves |
| seismic wave | vibrations that travel through earth carrying the energy released during an earthquake |
| tsunami | seismic sea wave |
| epicenter | the location on earth's surface directly above the focus, or origin, of an earthquake |
| foreshock | a small earthquake that often precedes a major earthquake |
| hanging valley | valley carved like mountain |
| cirque | bowl like depression in the side of a mountain caused by a glacier grinding down |
| horn | arete that has been eroded on multiple sides to form a pyramid like peak |
| arete | narrow ridge produced by glacial action |
| focus | the point within earth where an earthquake originates |
| earthquake | the vibration of earth cause by a release of energy |
| liquefaction | soils & other unconsolidated materials saturated with water are turned into a liquid that is not able to support buildings |
| moment magnitude(2) | more precise measurement of earthquake magnitude than richter derived from the amount of displacement that occurs along a fault zone & estimates the energy released by an earthquake |
| aftershock | a small earthquake that follows the main earthquake |
| zone of wastage | ice melts |
| zone of accumulation | snow is added |
| s-p lag | the time between the s-wave arrival and the p-wave arrival |
| abrasion | the wearing down of rock particles by friction due to water or wind or ice |
| plucking | the process by which a glacier picks up rocks as it flows over the land |
| richter scale | a scale that rates an earthquake's magnitude based on the size of its seismic waves |
| moraine | piles of plucked material |
| glacial advance | when winter snowfall exceeds summer snowfall |
| glacial retreat | when summer snowmelt exceeds winter snowfall |
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