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Science 4.1 and 4.2
notes
| Question | Answer |
|---|---|
| exploration vehicle | submersible |
| the submersible that discovered the Mid- Atlantic Ridge | Alvin |
| pan | all |
| Greek goddess of Earth " Mother Earth" | Gaea |
| 4 things that prove seafloor spreading | 1. Mesosauraus 2. age and type of rocks in Africa and South America3. mtn. ranges on 2 different continents connect 4. climate change( glacier debris in Africa and South America- coal deposits in US, Eur, Siberia |
| paleo | old |
| study of earth's magnetic history | paleomagnetism |
| Earth's magnetic orientation has reversed ____ times. | 9 |
| The proof for this magnetic orientation is | mineral stripes on either side of the ridge were mirror images |
| opposition to continental drift | seafloor spreading |
| princton professor that gathered information for seafloor spreading | Harry Hess |
| meso | middle |
| sauraus | terrible lizard |
| To have something decompose completely, you need to have | oxygen |
| name of park with Pacific Mid ocean ridge and Mid Atlantic Ridge | East Pacific Rise |
| Iceland means | Land of Ice and Fire |
| Iceland was formed by | lava eruptions of the Mid- Atlantic Ridge |
| In Iceland the Mid Atlantic Ridge ___ (does what) | Pokes head above sea level |
| Number of plates | 14 major, 38 minor |
| theory of the continental drift and seafloor spreading | plate tetonics |
| tetonics comes from the ______ word ______ which means ______. | Greek; tetonikos; construction |
| study of the formation of the features in the Earth's crust | tetonics |
| stated the continents have moved | continental drift |
| single landmass of all the continents - means all lands | Pangea |
| huge ocean | Panthalassa |
| undersea mountain range with a steep narrow valley running down it's center | Mid Atlantic Ridge |
| movement of the ocean floor | seafloor spreading |
| the study of magnetic properties of rocks | paleomagnetics |
| material on the ocean floor continental landmasses | oceanic |
| solid reletively rigid outer layer shell of the earth containing oceanic and continental crusts and part of the earth's upper mantle | lithosphere |
| a layer of plastic rock beneath the lithosphere | asthenosphere |
| two plates moving away from eachother | divergent boundary |
| in the center of the Mid Ocean Ridge valley formed as the plates separate | rift valley |
| the direct collision of 1 plate with another | convergent boundary |
| the region along a plate boundary where 1 plate is forced under another plate | subduction zone |
| chain of volcanic islands | island arc |
| 2 plates grind past eachother do not slide along smooothly | transform fault boundary |
| transfer of heat through a movement of heated fluid material | convection |
| cycle of warm water and cool water sinking to replace it | convection current |
| suggests that the continents are actually a patchwork of terranes | theory of terranes |
| pieces of land each with its own distict geologic history | terranes |
| fissure | |
| Red Sea occupied by a rift valley formed by | the separation of Africa and the Arabian Plates |
| fault | |
| boundary | |
| plate is forced under the plate with less dense continental crust- creates more oceanic crust | oceanic crust collides with continental crust |
| oceanic crust is _____ -er than continental crust | denser |
| oceanic crust is made of | basalt |
| continental crust os made of | granite |
| forms on the continental crust line | volcanoes |
| oceanic converging and subducting under continental causes volcanic activity along North Pacific coast | Juan de Fuca |
| leading edges of continental crust come together - what happens? | crust make fold which form large mountain ranges |
| oceanic crust converges with oceanic crust - what happens? | forms deep trenches |
| __________ are island arcs | Aleution islands |
| transform fault create | earthquakes |
| _ is higher along plate boundaries where two plates are moving apart | heat flow |
| major transform fault boundary | San Andreas Fault |
| Scientists have dtermined that there are higher tempuratures at _______ where heat escapes from " down under" | plate boundaries |
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