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Stack #4182095
| Question | Answer |
|---|---|
| The transfer of thermal energy by the movement of heated material from one place to another is called _______. | convection |
| Do cooler materials rise or sink? | sink |
| Do more dense materials rise or sink? | sink |
| Hot magma rises and cool magma sinks creating a convection _____ that move in a cycle. | currents |
| Convection currents set tectonic plates in ______. | motion |
| At an oceanic-continental convergent boundary,the subducting plates are also called ______. | slabs |
| As the older portion of the seafloor sinks, the weight of the uplifted ridge is used to push the oceanic plate (slab) towards the trench formed at the subduction zone in a process called ____________. | ridge push |
| _______ occurs as the weight of the relatively cool, dense subducting plate (slab) pulls the trailing slab into the subduction zone much like a tablecloth slipping off the table can pull dishes off with it. | slab pull |
| Slab pull is thought to be at least ____ as important as ridge push in moving an oceanic plate away from an oceanic ridge. | twice |
| Both ridge push and slab pull are involved in the plate motions at subduction ______ leading to seafloor spreading and plate movements (plate tectonics). | zones |
| All of the processes associated with the discharge of magma, hot fluids, ash, and gases from the Earth is called _______. | volcanism |
| Does most magma eruptions and volcanoes occur at convergent or divergent oceanic-continental boundaries? | convergent |
| Do volcanoes at oceanic-continental convergent boundaries have slow, mild eruptions or explosive eruptions? | explosive |
| The oceanic-continental convergent boundaries form a belt along which volcanoes form creating what is called the _____. | Ring of Fire. |
| Is the Ring of Fire in the Atlantic or Pacific Ocean? | Pacific |
| Divergent plate volcanoes occur at the ocean _______. | ridges |
| The lava takes the form of giant _____ and is called _____ lava. | pillows, pillow |
| Do volcanoes at oceanic divergent plate boundaries have slow, mild eruptions or explosive eruptions? | slow, mild eruptions |
| Unusually hot regions of the Earth’s mantle where high temperature plumes of magma rise to the surface away from plate boundaries are called ______. | hot spots. |
| As an oceanic plate moves over the hot spot, underwater __ form. | volcanoes |
| As the volcano cools and grows and rises above the water, an ____ forms. | island |
| Does the plate move to create a string of volcanoes and islands or does the hot spot move? | plate moves |
| Adding vinegar to baking soda would represent which type of eruption: Slow, mild eruptions at divergent plate ridges or explosive eruptions at oceanic-continental convergent subduction | Slow, mild eruptions at divergent plate ridges |
| Adding Mentos to coke would represent which type of eruption: Slow, mild eruptions at divergent plates ridges or explosive eruptions at oceanic-continental convergent subduction zones? | Explosive eruptions at oceanic-continental convergent subduction zones. |
| Inactive volcanoes that might erupt again are _____. | dormant |
| Inactive volcanoes that will not erupt again for possible thousands of years are _______. | extinct |
| Volcanoes that could erupt at any time are ______. | active |
| Where is the world’s most active volcano currently found? | on the Big Island of Hawaii (Kilauea Volcano) |
| What forms when hot spots occur beneath moving continental plates? | fissures that lead to flood basalts, flat plains and plateaus |
| What is the name of the flood basalts in the US? | Columbia River basalt in NW US |
| What is the name of the 65million year old basalt plateaus in India that may have caused the global climate change that contributed to the extinction of the dinosaurs as the ash blocked the sun’s rays leading to an Ice Age? | Deccan Traps |
| The process of forming mountains (mountain building) from uplift as plates continental plates collide is called _______. | orogeny |
| The Colorado Plateau was formed from ______. | uplift |
| Then, the Colorado River eroded the land creating the _____ in Arizona. | Grand Canyon |
| Once magma reaches the Earth’s surface, it is called ______. | lava |
| How fast the lava flows is called ______. High viscosity lava flows: fast or slow? | viscosity, Fast |
| Is a low, broad (largest) volcano with slow, mild eruptions that is usually over a hot spot; lava can flow for miles (Mauna Loa and Kilauea in Hawaii are examples) | shield |
| Is a small volcano with steep sides; lots of loose material so it erodes easily (Sunset Crater in Arizona is an example) | cinder cone |
| Is a tall, volcano with rugged sides; is the most violent and explosive; unpredictable eruptions; landslides and mudslides are common; lots of ash, steam, and gases (Mt. St. Helens, Mt. Vesuvius, Mt. Rainier are examples) | composite (stratovolcano) |
| The bowl-shaped, circular depression left by an outward explosion of a volcano is called a ______. | crater |
| The bowl-shaped, less-circular depression left by an inward collapse of a volcano is called a _____. | caldera |
Created by:
tarawaraa