Science Flashcards
Volcano
When two oceanic plates collide the result must be
Volcanos in island arc
The force that causes magma to erupt at the surface is caused by
Dissolved gases under pressure
An eruption of thin, fluid lava would most likely be
A quiet eruption
Alternating layers of lava and volcanic ash are found in
Composite volcanos
Which of the following has active volcanos
Triton
Name the spots of a volcano
page 95 in the book
Many volcanos are found in \island arc/ that form when two oceanic plates collide
true
Thin runny lava usually hardens into \ash cinders and bombs/
False, Lava plateaus or shield
An \extinct/ volcano is not likely to erupt during your lifetime
True
\Hot spots/ from where plume of magma rises through the crust from the mantle
true
The volcano Olympus Moon is on \ Venus/
False, Mars
What is the ring of fire
a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
The mid-ocean ridge marks a diverging plate boundary, and lava pours out of cracks in the ocean floor.
Where are hot spot volcanos located in relation to Earth’s plate?
In the middle of plates, often far from plate boundaries
What effect does silica contents have on the characteristics of magma
The amount of silica in magma helps determine how easily the magma flows. Magma high in silica produces light-colered lava that is too sticky to flow very far and form rhyolite, pumice, and obsidian
Describe the three stages of a lifestyle in a volcano
An active volcano is one that has erupted in the recent past and is likely to erupt in the near future. A dormat volcano is one that is currently inactive, but may someday become active again. An extinct or dead volcano is unlikely to erupt again
How do hot springs and geysers form
Hot springs form when groundwater heated by a body of magma rises to the surface and collects in a pool. A geyser forms when rising hot water and steam are trapped underground in a narrow crack until pressure builds and the mixture sprays to the surface
While observing a lava flow from a recently active volcano you notice an area of lava with a rough, chunky surface. What type of is this and how does it form?
Aa; forms from cooler,slower-moving lava.
How does a shield volcano form?
Many small earthquakes can occur in the area around a volcano before it erupts. these quakes are triggered by movement of magma into the magma chamber and through a pipe.
Why can earthquakes be a warning sign that an eruption is about to happen
Many small earthquakes can occur in the area around a volcano before it erupts. These quakes are triggered by movement of magma into the magma chamber and through the pipe.
