| Term | Definition |
|---|
| Fault-block | Forms when a normal faults uplift a block of rock. |
| Rock | When two normal faults form parallel to each other a block of this is left lying between them. |
| Upward | As the hanging wall of each normal fault slips downward, the block in between moves _____. |
| Valley | When a block of rock lying between two normal faults slides downward, this forms. |
| Fold | Under certian conditions, plate movement causes the crust to do this. |
| Crust | Folds are bends in rock that form when compression shortens and thickens part of the earths______. |
| Plates | The collisions of two ______ can cause compression and folding of the crust. |
| Anticline | A fold in the rock that bends upward in a arch is one of these. |
| Syncline | A fold in the rock thatbends downward in the middle to form a bowl is called this. |
| Uplift | The force that raises mountians, can also raise plateaus. |
| Plateau | This is a large area of flat land elevated high above sea level. |
| Flat | Some plateaus form when vertical faults push up a large _____ block of rock. |
| Sea Floor | The vast slab of rock once formed part of a ______, but today , much of the plateaus lies more than 1500 meters above sea level. |
| Ash | The smallest pieces are volcanic ______. |
| Cinders | ______ are pebble sized particles. |
| Bombs | _______ are larger pieces that can range from the size of of a baseball to the size of a car! |
| Pyroclastic flow | A ______ flow occurs when an explosive eruption hurls out ash, cinders, and bombs as well as gasses. |
| Active | An _______ volcano is one that is erupting or has shown signs that it may erupt in the near future. |
| Dormat | A ________ volcano may awaken in the future and become active. |
| Extinct | An ______ volcano is unlikely to erupt agian. |
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