| Term | Definition |
|---|
| theory of continental drift | the theory that the tectonic plates move around the earth |
| convergent boundry | boundry where two plates collide |
| divergent boundry | boundry where two plates move apart |
| transform boundry | boundry where two plates slide past each other |
| asthenosphere | upper weak layer of the mantle |
| lithosphere | rock layer of the earth |
| earthquake | vibration of earth produced by energy release |
| focus | place in the earth where earthquake originates |
| epicenter | place on the surface directly above the focus |
| elastic rebound theory | when rocks are deformed by pressure then they slip back into place |
| mercalli scale | earthquake scale that used observations of destruction |
| richter scale | earthquake scale that used the actual amplitude |
| seismograph | instruments that are used to measure earthquakes |
| magnitude of earthquakes | the energy relased during an earthquake |
| tsunami | a large wave that is caused by an earthquake on the ocean floor |
| aa lava | type of lava that is sharp when dried |
| pahoehoe lava | type of lava that is smooth when dried |
| ring of fire | a ring of tectonic activity around the pacific plate |
| where tectonic activity occurs | on and under the earths surface |
| what coal indicates about climate | coal indicates a warmer climate zone |
| what happened to magnectic poles | switched |
| clues to continental drift theory | continental jigsaw, fossils, ocean floor |
| objection the continental drift | the earth lacks the mechanism to drive the motion |
| age of the ocean floor | newest along atlantic ridge |
| 2 continents were together 100mya | africa and south america |
| how much energy is released by a 1.0 on richter scale | idk |
| how to determine distance of earthquake | from three different points, find epicenter and draw circles |
| how we know about inside of earth | measure how waves travel through it |
| what effects earthquake damage | idk |
| determines volcanoes eruptive potential | buildup of magma in the pipes |
| gases given off during earthquake | toxic gases |
| why magma rises | lighter than rock and under pressure |
| where convection currents occur | in the asnthosphere |
| tectonics | plates that move around the earths surface |
| pangea | supercontinent |
| p waves | primary waves, fastest, first |
| surface waves | s shapes along surface, slowest, destructive |
| ocean crust | more dense and heavy crust |
| continental crust | less dense and lighter crust |
| pacific plate | plate that carries the pacific ocean, ring of fire around it |
| mt st helens eruption | explosive eruption |
| volcano effect on climate | nuclear winter |
| 1906 earthquake | in southern CA |
| crust | outer layer of the earth |
| mantle | middle layer of the earth |
| outer core | liquid core |
| inner core | solid core |
Combine with other sets
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