Term
| a weak spot in the earth’s crust where molten material comes to the earth’s surface. |
|
Definition
|
|
Term
| Volcanoes that have not erupted in the past 50 years. They are considered inactive. |
|
Definition
|
|
Term
| Volcanoes that are not expected to erupt again. |
|
Definition
|
|
Term
| A molten (melted) mixture of rock-forming substances, gases, and water from the mantle |
|
Definition
|
|
Term
| When magma reaches the surface cools and becomes rock. |
|
Definition
|
|
Term
| Location of Volcanic activity |
|
Definition
| Most volcanoes form at the earth’s plate boundaries. |
|
|
Term
| Weak areas in the lithosphere plate where A volcano can form far from a plate boundary. |
|
Definition
|
|
Term
| The simplest volcano, forms when eruptions throw out mostly rock and ash but produce little lava flows |
|
Definition
|
|
Term
| These are non-explosive lava flows where the lava flows in all directions from a central vent forming a low broad cone. (these volcanoes have less gas and silica) |
|
Definition
|
|
Term
| Alternate big eruptions of rock and ash with quiet lava flows. |
|
Definition
|
|
Term
| The result of a collapsing of the walls of a volcanic dome leaving a large bowl shaped depression. |
|
Definition
|
|
Term
| The pit like opening at the top of the volcano. |
|
Definition
|
|
Term
| The resistance of a liquid to flow. |
|
Definition
|
|
Term
| The viscosity of magma depends upon its ______ content and ___________ |
|
Definition
|
|
Term
| Fast-moving, hot lava that has low viscosity. |
|
Definition
|
|
Term
| Lava that is cooler and slower-moving, |
|
Definition
|
|
Term
| Occurs when an explosive eruption hurls out mixtures of hot gases, ash, cinders, and bombs (large rocks) |
|
Definition
|
|
