Term
|
Definition
| the geosystem that sustains the earh's magnetic field, driven by convection in the outer core |
|
|
Term
|
Definition
| thick outer layer of the earth. around 8 km thick underneath the oceans, and 40 km underneath the continents. |
|
|
Term
|
Definition
| central part of the earth below a depth of 2900 km. containing a liquid outer core and solid inner core. |
|
|
Term
|
Definition
| the strong rigid outer shell of the earth that encases the asthenosphere and contains the crust and the upper-most part of the mantle down to an average depth of about100 km |
|
|
Term
|
Definition
| The weak layer of soft but solid rock conisisting of the lower part of the upper mantle |
|
|
Term
|
Definition
| The region that forms the main bulk of the solid Earth, between the crust and the core, ranging from depths of about 40 km to 2900 km. |
|
|
Term
|
Definition
| A liquid zone--composed of iron, nickel, and minor amounts of some lighter element, such as oxygen or sulfur--below the mantle, from a depth of 2890 to 5190 km, that surrounds a solid iron-nickel inner core. |
|
|
Term
|
Definition
The ground vibration produced by earthquakes or explosions.
|
|
|
