Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Earth History Voc.
| Question | Answer |
|---|---|
| Lithosphere | layer of earth made up of crust and rigid part of the upper mantle |
| Asthenosphere | layer in earth's upper mantle that is soft because it is close to melting |
| Tectonic Plates | one of large moving pieces of Earth's lithosphere (oceanic/continental) |
| Continental Drift | hypothesis that Earth's continents move on Earth's surface |
| Pangaea | hypothetical super continent that included all the land masses of Earth, broke apart 200 million years ago |
| Theory of Plate Tectonics | theory stating that Earth's lithosphere is broken into huge plates that move and change size over time |
| Rift Valley | deep valley formed as tectonic plates move apart, such as along a mid-ocean ridge |
| Magnetic Reversal | switch in the direction of the Earth's magnetic field so that magnetic north and south switch |
| Hot Spot | area where a column of hot material rises from deep within the mantle and heats the lithosphere, causing volcanic activity |
| Subduction | when oceanic plate sinks under another plate in Earth's mantle |
| Inner Core | a ball of hot, solid metals |
| Outer Core | a layer of liquid metals that surrounds the inner core |
| Mantle | the layer of rock between Earth's outer core and crust, in which most rock is hot enough to flow in convection currents; Earth's thickest layer |
| Crust | a thin layer of cool rock |
| Convection Current | a circular pattern in which material is heated and rises in one area, then cools and sinks in another area, flowing into a continuos loop |
| Divergent Boundary | a boundary along which two tectonic plates move apart, characterized by either a mid-ocean ridge or a continental rift valley |
| Convergent Boundary | a boundary along which two tectonic plates push push together, characterized either by subduction or continental collision |
| Continental-Continental Collision | a boundary along which two plates carrying continental crust push together |
| Mid-Ocean Ridge | a long line of sea floor mountains where new ocean crust is formed by a volcanic activity along a divergent boundary |
| Convection | the transfer of energy from place to place by the motion of heated gas or liquids |
| Transform Boundary | a boundary along which two tectonic plates scrape past each other, and crust is neither formed nor destroyed |
| Oceanic-Oceanic | a boundary along which a plate carrying oceanic crust sinks beneath another plate with oceanic crust |
| Oceanic-Continental Subduction | a boundary along which a plate carrying oceanic crust sinks beneath a plate with continental crust |
| Fossil | an object that is a trace or remains of living things from the past |
| Original Remains | fossils that are the actual bodies or body parts of an organism Ex: Bones |
| Ice Core | a sample of earth that is taken in a tube and shows the layers that have built up over thousands of years |
| Relative Age (Dating) | the age of an even or object in relation to other events or objects (younger or older) |
| Absolute Age (Dating) | the actual age in years of an object or event |
| Index Fossil | fossils of organisms that were in common, lived in many areas, and existed only during a certain time span |
| Half-Life | the length of time it takes for half of the atoms of a radioactive element to change to another form |
| Uniformitarianism | the theory that Earth is an always changing place and that the same forces of change from the past are at work today |
| Geological Time Scale | the scale that divides Earth's history into intervals that are defined by major events or changes on Earth |
Created by:
ThompsonML
Popular Science sets