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Volcano Test Review
Volcano Test
| Question | Answer |
|---|---|
| Magma that is thicker and slower moving contains | more silica |
| Lava erupts through a | vent |
| This is a weak spot in the crust where magma comes through | hot spot |
| This type of volcano has long, gentle slopes. | Shield Volcano |
| Why does magma flow upward through the crust? | It is less dense than the surrounding material. |
| Volcanoes in the Circum-Pacific Belt are associated with this type of boundary. | Convergent |
| What are the three variables that affect the temperature at which magma forms? | composition of source material, pressure, and water content |
| These are the smallest type of volcanoes. | Cinder-cones |
| What volcano is explosive and dangerous to humans? | Composite |
| What type of magma has the lowest gas content and low viscosity? | Basaltic |
| What type of magma has the highest gas content and a high viscosity? | Rhyolitic |
| The source material that forms andesitic magma is | oceanic crust/sediments |
| True or False - The oldest Hawaiian volcano is the farthest from the hot spot. | True |
| The most active Hawaiian volcano is Kilauea which is located on the main island, Hawaii. Why is it the most active? | It is located closest to the hot spot. |
| Which of the following are landscape features associated with volcanoes? | vents, craters, and calderas |
| True or False - Cinder cones are usually found at the edges of larger volcanoes. | True |
| The word composite is a good name for a composite volcano because | Composite volcanoes are made up of layers of ash and lava |
| Which boundary is associated with explosive volcanoes? | Convergent |
| This is formed when the top or side of a volcano collapses into the magma chamber that fueled the volcano. | Caldera |
| This type of volcano forms steep sides from a highly viscous lava with a high water, high silica, and a high gas content. | Cinder cone |
| What substances could be used to demonstrate the effects of temperature on the viscosity of lava? | vegetable oil, corn syrup, water |
| How would you manipulate the temperature of the substance used in a lab to determine the viscosity of a substance. | heat or cool the substance |
| How would you measure the viscosity of the substance? | Time how long it takes a substance to move down an inclined surface. |
| What would be the independent variable in a lab testing how heat affects the viscosity of a substance? | Temperature |
| What would be the control in a lab testing how heat affects the viscosity of a substance? | The viscosity of the substance at room temperature. |
| What must stay the same in a lab testing how heat affects the viscosity of a substance? | The amount and type of substance being tested, the angle of inclined surface, and the distance the substances are allowed to flow. |
| When creating a graph showing the data from a lab testing how heat affects the viscosity of a substance, you would label the x axis as | temperature |
| Time/distance would be labeled on what axis of a graph showing data from a lab determining how temperature affects viscosity. | y-axis |
| How does convergent volcanism occur? | An oceanic plate is subducted under a continental plate. |
| Pillow lava comes from a nonexplosive volcano that forms at this boundary | divergent |
| Immediate dangers from an explosive volcano are | large pieces of tephra falling on people and buildings and pyroclastic flow burning down everything in its path. |
| What is a long term effect from an explosive volcano? | ash that remains in the atmosphere long after the eruption which will block solar energy that can decrease solar energy. |
Created by:
ceadams00
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