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Earth
continents and oceans
| Question | Answer |
|---|---|
| percent of earth is ocean | 71 |
| percent of earth is covered by continents | 35 |
| the balance between the forces that raise land masses and the forces that depress them | isostacy |
| german meteorologist who developed the theory of continental drift | Alfred Wegner |
| the theory that continents can move apart from each other and have done so in the past | continental drift |
| name of super continent | pangea |
| named supercontinent | alfred wegner |
| name of the water | panthalassa |
| pangea is greek for | all lands |
| panthalassa is greek for | all seas |
| who used magnetics to prove pangea | lawrence morley, frederick vine, drummond matthews |
| where is lawrence morley from | canada |
| where is frederick vine from | britain |
| where is drummond matthews from | britain |
| how many major plates | 7 |
| how many minor plates | 12 |
| the study of the movements and changes in the rocks that make up the earths crust | techtonics |
| the lithosphere is divided into plates that float and move on the asthenosphere | plate techtonics |
| the outermost rigid layer of the earth composed of the stiff upper layer of the mantle and the crust | lithosphere |
| large sections of crust | plates |
| the layer of the upper mantle composed of low density rock material like putty | athenosphere |
| magma moves in the magma and core area in a circle. this makes plates move which makes continents move. | convection current |
| the point where plates touch each other | plate boundary |
| boundary between two plates that are moving together | convergent boundary |
| place where 2 plates are pulling apart | divergent boundary |
| two plates slide past each other horizontally | transform boundary |
| compressional stress | convergent boundary |
| tensional stress | divergent boundary |
| shearing stress | transform boundary |
| a permanent change in the shape or volume of rocks | deformation |
| bending of rock layers due to stress in the earths crust | folding |
| breaking of the earths crust and the sliding of blocks of crust along the break | faulting |
| a break in the earths surface | fracture |
| a deep underwater valley | trench |
| force that causes earths crust to change its shape and/or volume | stress |
| two types of folding | syncline anticline |
| syncline up or down | down |
| anticline up or down | up |
| land mass above the fault | hanging wall |
| the land mass below the fault | footwall |
| downward movement caused by tensional stress | normal fault |
| compressional stress causes the hanging wall to climb up the footwall | reverse fault |
| process of mountain formation | orogenesis |
| 3 types of mountains | folded, fault-block, and volcanic |
| type of mountain forms when converging rock layers are squeezed together and pushed upward | folded |
| type of mountain that forms at divergent boundaries (pull apart, break, form a cliff) | fault-block |
| formed at volcano | volcanic |
| large areas of flat-topped rocks high above sea level | plateaus |
Created by:
bearded bob
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