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science
earth stack #11
| Question | Answer |
|---|---|
| the material that forms Earths hard surface | rock |
| scientist who study earth | geologists |
| features formed in rock | landforms |
| earths surface changes its appearancedue to: | constructive forces(volcanoe)deconsructive(wind water waves) |
| the earths radious | 6000 kilo |
| scientists use ____________to study earths interior | seismic waves |
| the deeper n2 the earth you go the blank and blank increase | temp presure |
| 3 main layers | crust, mantle, cor |
| outer layer of rock | crust |
| crust is_-__ kilo long | 5-40 |
| crust is thinner on __________ and thicker on___________ | ocean floor mountains |
| 2 kinds of crust | continental oceanic |
| the rock that makes up the oceans crust dark, dense | basalt |
| usually light makes up continental crust | granite |
| below crust supports the rocky crust | mantle |
| the rigid part of the crust and upper mantle | lithosphere |
| lithos meaning | stone |
| mantle has 2 sections | lithosphere asthenosphere |
| heated rock bgins to _________ | soften |
| asthenes meaning | weak |
| core 2 parts | outer core- molten rockinner-hard dense ball of solid metal |
| _____________ noticed that the coast lines of continets appearred to fit together like peices of jigsaw puzzle | map makers |
| ________________hypothesis was that all continents joine together to form a single landmass | alfred wegener |
| wegener named the super continent | pangea |
| pangea means | all lands |
| pangea exsisted ___ milion years ago | 300 |
| name of wegeners theory | conntinental drift |
| proof to support wegeners thery | (1)landforms(2)fossils(3)climate change |
| panthalassas | all seas |
| 3 direction ontinents drift | (1)converging continents(2)diverging continents(3)transform |
| _______________is ttransform--slipping past | san andreas fault |
| why was wegeners theory rejected | he couldnt eplain a force strong enough 2 move continents |
| it cicles tru the oceons like the seems on a baseball | mid atlantic ridge |
| ___________explored the mid atlantic ridge and determined that the force of magmacoming from the vent could cause enough force 2 create the continental drift | harry hess |
| the valley created by 2 diverging plates where magma comes | rift |
| area in africa where 2 diverging plates | great rift valey |
| longest range of mountains n the world mostly under water only a fe places rise above thewaters surface (ex.island) | mid ocean ridge |
| the mid ocean rige in the atlantic is called | mid atlantic ridge |
| the mid ocean ridge in the pacific is called | east pacific rise |
| process of magma rising from rift at mid ocean ridge creating `tall mountains but new magma pushes old rock toward the coast line spush the continents along with it this gave evidence of the power or force that causes continental drift | sea floor spreading |
| uses echo sounds 2 map the mid ocan ridge | sonar |
| submersible that explored the mid ocean ridge | alvin |
| the process in which the ocean floor sinks beneat a deep ocean trench and back into the mantle | subduction |
| at ___________________ subduction allows part of the ocean floor 2 sink back n2 te mantle | deep ocean trenches |
Created by:
katie weathersbee