vocabulary for layers of the Earth and plate tectonics
Terms : Hide Images
| 996224438 | continental plates | thicker but less dense than oceanic crust | 0 | |
| 996224439 | oceanic plates | Thin plates that form the ocean floor; more dense than continental plates. | 1 | |
| 996224440 | plate movement | Movement caused by convection in the asthenosphere | 2 | |
| 996224441 | asthenosphere | A plastic, or flowing, layer within Earth's mantle | 3 | |
| 996224442 | convergent boundary | a plate boundary at which plates come together | 4 | |
| 996224443 | Panthalassa | Name given by Alfred Wegener to the ocean surrounding Pangaea. | 5 | |
| 996224444 | mid-ocean ridge | An undersea mountain chain where new ocean floor is produced | 6 | |
| 996224445 | subduction zone | a place where the more dense plate dives under the less dense plate | 7 | |
| 996224446 | divergent boundary | A plate boundary where two plates move away from each other; example is mid-ocean ridge | 8 | |
| 996224447 | continental collision | when two continental plates collide pushing the continental crust up to form mountains | 9 | |
| 996224448 | Pangaea | The name of the single landmass that broke apart 200 million years ago and gave rise to today's continents | 10 | |
| 996224449 | sea floor spreading | The process that creates new sea floor as plates move away from each other at the mid-ocean ridges | 11 | |
| 996224450 | paleomagnetism | Earth's magnetism reverses approximately every 50 million years. (Proved by sea floor spreading) | 12 | |
| 996224451 | lithosphere | includes the crust and the rigid upper part of the mantle | 13 | |
| 996302187 | inner core | A dense sphere of solid iron and nickel at the center of Earth | 14 | |
| 996302188 | outer core | Hot liquid core that surrounds Earth's solid inner core& that is made mostly of iron | 15 | |
| 996302189 | mantle | Earth's thickest layer made of hot rock and makes up 2/3 of the earth's mass; convection takes place here below the lithosphere | 16 | |
| 996302190 | crust | outer layer of Earth made of solid rock and soil | 17 | |
| 996302191 | magnetosphere | The outer part of Earth's magnetic field. | 18 | |
| 996494336 | evidence for continental drift | 1) continental fit, 2) similarity of fossil plants and animals, 3) similarity of rock sequences, 4) paleomagnetism | 19 | |
| 996494337 | Alfred Wegener | A German scientist who proposed the theroy of continental drift | 20 | |
| 996494338 | granite | type of rock found commonly in continental plates | 21 | |
| 996494339 | basalt | type of rock found commonly in oceanic plates | 22 | |
| 996494340 | Harry Hess | Harry Hess discoved the mid- atlantic ridge and sea-floor spreading | 23 | |
| 996494341 | plate boundaries | areas where tectonic plates converge, diverge or slide past each other creating earthquakes and volcanic activity | 24 | |
| 996494342 | faults | A break in the Earth's crust along which movement has occured | 25 | |
| 996494343 | stress | amount of force acting on rock; compression, tension, shear | 26 | |
| 996494344 | compression stress | stress that squeezes rocks together till it folds or break. It occurs along convergent boundaries; makes folded mountains | 27 | |
| 996494345 | tension stress | stress that pulls on the crust and stretches rocks and make it thinner; occurs where two plate are moving apart | 28 | |
| 996494346 | shear stress | Stress that caused when two parts of rock slide past one another causing twisting, bending and breaking | 29 | |
| 996505996 | strike slip fault | a type of fault where rocks on either side move past each other sideways with little up or down motion; transform boundary | 30 | |
| 996505997 | normal fault | A type of fault where the hanging wall slides downward; caused by tension in the crust; divergent boundary | 31 | |
| 996505998 | reverse fault | A type of fault where the hanging wall slides upward; caused by compression in the crust; convergent boundary | 32 | |
| 996505999 | transform boundary | A plate boundary where two plates move past each other in opposite directions | 33 | |
| 996539923 | heat transfer | Heat transfers from warmer to cooler objects, so that both objects tend to reach a common temperature; methods conduction, convection, and radiation | 34 | |
| 996539924 | radiation | Heat transfer between an empty space (not touching). | 35 | |
| 996539925 | conduction | Energy is passed from atom to atom through direct contact | 36 | |
| 996539926 | convection | Process by which, in a fluid being heated, the warmer part of the mass will rise and the cooler portions will sink. | 37 | |
| 996539927 | density | Mass per unit volume | 38 |
